diff --git a/configuration/ids.nix b/configuration/ids.nix
index 895b976..5488ff0 100644
--- a/configuration/ids.nix
+++ b/configuration/ids.nix
@@ -4,6 +4,12 @@
   ids.uids = {
     # System user ids start at 400 (see nixos/modules/programs/shadow.nix)
     webserver = 400;
+    minecraft = 401;
     # The limit is 999
   };
+
+  ids.gids = {
+    webserver = 400;
+    minecraft = 401;
+  };
 }
diff --git a/configuration/services/configs/nginx-nextcloud.conf b/configuration/services/configs/nginx-nextcloud.conf
index 3eb1193..7c6ad78 100644
--- a/configuration/services/configs/nginx-nextcloud.conf
+++ b/configuration/services/configs/nginx-nextcloud.conf
@@ -24,37 +24,31 @@ http {
 
     keepalive_timeout  65;
 
-    set_real_ip_from  10.0.0.0/8;
-    set_real_ip_from  172.16.0.0/12;
-    set_real_ip_from  192.168.0.0/16;
-    real_ip_header    X-Real-IP;
-
     #gzip  on;
 
     upstream php-handler {
-        server nextcloud-nextcloud:9000;
+        server localhost:9000;
     }
 
     server {
         listen 80;
 
-        # Add headers to serve security related headers
-        # Before enabling Strict-Transport-Security headers please read into this
-        # topic first.
-        #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
-        #
+        # HSTS settings
         # WARNING: Only add the preload option once you read about
         # the consequences in https://hstspreload.org/. This option
         # will add the domain to a hardcoded list that is shipped
         # in all major browsers and getting removed from this list
         # could take several months.
-        add_header Referrer-Policy "no-referrer" always;
-        add_header X-Content-Type-Options "nosniff" always;
-        add_header X-Download-Options "noopen" always;
-        add_header X-Frame-Options "SAMEORIGIN" always;
-        add_header X-Permitted-Cross-Domain-Policies "none" always;
-        add_header X-Robots-Tag "none" always;
-        add_header X-XSS-Protection "1; mode=block" always;
+        #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
+
+        # HTTP response headers borrowed from Nextcloud `.htaccess`
+        add_header Referrer-Policy                      "no-referrer"   always;
+        add_header X-Content-Type-Options               "nosniff"       always;
+        add_header X-Download-Options                   "noopen"        always;
+        add_header X-Frame-Options                      "SAMEORIGIN"    always;
+        add_header X-Permitted-Cross-Domain-Policies    "none"          always;
+        add_header X-Robots-Tag                         "none"          always;
+        add_header X-XSS-Protection                     "1; mode=block" always;
 
         # Remove X-Powered-By, which is an information leak
         fastcgi_hide_header X-Powered-By;
@@ -62,27 +56,48 @@ http {
         # Path to the root of your installation
         root /var/www/html;
 
+        # Specify how to handle directories -- specifying `/index.php$request_uri`
+        # here as the fallback means that Nginx always exhibits the desired behaviour
+        # when a client requests a path that corresponds to a directory that exists
+        # on the server. In particular, if that directory contains an index.php file,
+        # that file is correctly served; if it doesn't, then the request is passed to
+        # the front-end controller. This consistent behaviour means that we don't need
+        # to specify custom rules for certain paths (e.g. images and other assets,
+        # `/updater`, `/ocm-provider`, `/ocs-provider`), and thus
+        # `try_files $uri $uri/ /index.php$request_uri`
+        # always provides the desired behaviour.
+        index index.php index.html /index.php$request_uri;
+
+        # Rule borrowed from `.htaccess` to handle Microsoft DAV clients
+        location = / {
+            if ( $http_user_agent ~ ^DavClnt ) {
+                return 302 /remote.php/webdav/$is_args$args;
+            }
+        }
+
         location = /robots.txt {
             allow all;
             log_not_found off;
             access_log off;
         }
 
-        # The following 2 rules are only needed for the user_webfinger app.
-        # Uncomment it if you're planning to use this app.
-        #rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
-        #rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
+        # Make a regex exception for `/.well-known` so that clients can still
+        # access it despite the existence of the regex rule
+        # `location ~ /(\.|autotest|...)` which would otherwise handle requests
+        # for `/.well-known`.
+        location ^~ /.well-known {
+            # The rules in this block are an adaptation of the rules
+            # in `.htaccess` that concern `/.well-known`.
 
-        # The following rule is only needed for the Social app.
-        # Uncomment it if you're planning to use this app.
-        #rewrite ^/.well-known/webfinger /public.php?service=webfinger last;
+            location = /.well-known/carddav { return 301 /remote.php/dav/; }
+            location = /.well-known/caldav  { return 301 /remote.php/dav/; }
 
-        location = /.well-known/carddav {
-            return 301 $scheme://$host:$server_port/remote.php/dav;
-        }
+            location /.well-known/acme-challenge    { try_files $uri $uri/ =404; }
+            location /.well-known/pki-validation    { try_files $uri $uri/ =404; }
 
-        location = /.well-known/caldav {
-            return 301 $scheme://$host:$server_port/remote.php/dav;
+            # Let Nextcloud's API for `/.well-known` URIs handle all other
+            # requests by passing them to the front-end controller.
+            return 301 /index.php$request_uri;
         }
 
         # set max upload size
@@ -97,77 +112,56 @@ http {
         gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
         gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
 
-        # Uncomment if your server is build with the ngx_pagespeed module
-        # This module is currently not supported.
+        # Pagespeed is not supported by Nextcloud, so if your server is built
+        # with the `ngx_pagespeed` module, uncomment this line to disable it.
         #pagespeed off;
 
-        location / {
-            rewrite ^ /index.php;
-        }
+        # Rules borrowed from `.htaccess` to hide certain paths from clients
+        location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/)  { return 404; }
+        location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console)                { return 404; }
 
-        location ~ ^\/(?:build|tests|config|lib|3rdparty|templates|data)\/ {
-            deny all;
-        }
-        location ~ ^\/(?:\.|autotest|occ|issue|indie|db_|console) {
-            deny all;
-        }
-
-        location ~ ^\/(?:index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+)\.php(?:$|\/) {
-            fastcgi_split_path_info ^(.+?\.php)(\/.*|)$;
+        # Ensure this block, which passes PHP files to the PHP process, is above the blocks
+        # which handle static assets (as seen below). If this block is not declared first,
+        # then Nginx will encounter an infinite rewriting loop when it prepends `/index.php`
+        # to the URI, resulting in a HTTP 500 error response.
+        location ~ \.php(?:$|/) {
+            fastcgi_split_path_info ^(.+?\.php)(/.*)$;
             set $path_info $fastcgi_path_info;
+
             try_files $fastcgi_script_name =404;
+
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
             fastcgi_param PATH_INFO $path_info;
-            # fastcgi_param HTTPS on;
+            #fastcgi_param HTTPS on;
 
-            # Avoid sending the security headers twice
-            fastcgi_param modHeadersAvailable true;
-
-            # Enable pretty urls
-            fastcgi_param front_controller_active true;
+            fastcgi_param modHeadersAvailable true;         # Avoid sending the security headers twice
+            fastcgi_param front_controller_active true;     # Enable pretty urls
             fastcgi_pass php-handler;
+
             fastcgi_intercept_errors on;
             fastcgi_request_buffering off;
         }
 
-        location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
-            try_files $uri/ =404;
-            index index.php;
+        location ~ \.(?:css|js|svg|gif)$ {
+            try_files $uri /index.php$request_uri;
+            expires 6M;         # Cache-Control policy borrowed from `.htaccess`
+            access_log off;     # Optional: Don't log access to assets
         }
 
-        # Adding the cache control header for js, css and map files
-        # Make sure it is BELOW the PHP block
-        location ~ \.(?:css|js|woff2?|svg|gif|map)$ {
+        location ~ \.woff2?$ {
             try_files $uri /index.php$request_uri;
-            add_header Cache-Control "public, max-age=15778463";
-            # Add headers to serve security related headers (It is intended to
-            # have those duplicated to the ones above)
-            # Before enabling Strict-Transport-Security headers please read into
-            # this topic first.
-            #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
-            #
-            # WARNING: Only add the preload option once you read about
-            # the consequences in https://hstspreload.org/. This option
-            # will add the domain to a hardcoded list that is shipped
-            # in all major browsers and getting removed from this list
-            # could take several months.
-            add_header Referrer-Policy "no-referrer" always;
-            add_header X-Content-Type-Options "nosniff" always;
-            add_header X-Download-Options "noopen" always;
-            add_header X-Frame-Options "SAMEORIGIN" always;
-            add_header X-Permitted-Cross-Domain-Policies "none" always;
-            add_header X-Robots-Tag "none" always;
-            add_header X-XSS-Protection "1; mode=block" always;
-
-            # Optional: Don't log access to assets
-            access_log off;
+            expires 7d;         # Cache-Control policy borrowed from `.htaccess`
+            access_log off;     # Optional: Don't log access to assets
         }
 
-        location ~ \.(?:png|html|ttf|ico|jpg|jpeg|bcmap|mp4|webm)$ {
-            try_files $uri /index.php$request_uri;
-            # Optional: Don't log access to other assets
-            access_log off;
+        # Rule borrowed from `.htaccess`
+        location /remote {
+            return 301 /remote.php$request_uri;
+        }
+
+        location / {
+            try_files $uri $uri/ /index.php$request_uri;
         }
     }
 }
diff --git a/configuration/services/gitea.nix b/configuration/services/gitea.nix
index 2258566..221b976 100644
--- a/configuration/services/gitea.nix
+++ b/configuration/services/gitea.nix
@@ -24,7 +24,7 @@
 
         environment = {
           DB_TYPE = "postgres";
-          DB_HOST = "gitea-postgres:5432";
+          DB_HOST = "localhost:5432";
           DB_NAME = "gitea";
           DB_USER = "gitea";
 
diff --git a/configuration/services/minecraft.nix b/configuration/services/minecraft.nix
index bf8f58f..23705ac 100644
--- a/configuration/services/minecraft.nix
+++ b/configuration/services/minecraft.nix
@@ -54,6 +54,16 @@ in {
   nixpkgs.config.allowUnfreePredicate = pkg:
     builtins.elem (lib.getName pkg) [ "forge-server" ];
 
+  users = {
+    extraUsers.minecraft = {
+      uid = config.ids.uids.minecraft;
+      group = config.users.extraGroups.minecraft.name;
+      isSystemUser = true;
+      description = "Minecraft server user";
+    };
+    extraGroups.minecraft = { gid = config.ids.gids.minecraft; };
+  };
+
   virtualisation.oci-containers.containers.minecraft-voor-kia = let
     properties = ./configs/minecraft/voor-kia/server.properties;
     icon = ./configs/minecraft/voor-kia/server-icon.png;
@@ -73,9 +83,8 @@ in {
       ];
 
       config = let
-        # Use the upstream minecraft uid
-        uid = toString config.ids.uids.minecraft;
-        gid = toString config.users.groups.nogroup.gid;
+        uid = toString config.users.extraUsers.minecraft.uid;
+        gid = toString config.users.extraGroups.minecraft.gid;
       in {
         Cmd = [ "forge-server" ] ++ minecraft-server-args;
         WorkingDir = "/var/lib/minecraft";
diff --git a/configuration/services/nextcloud.nix b/configuration/services/nextcloud.nix
index f8a0f08..7d94bcf 100644
--- a/configuration/services/nextcloud.nix
+++ b/configuration/services/nextcloud.nix
@@ -11,6 +11,7 @@
         image = "nextcloud:fpm-alpine";
         dependsOn = [ "postgres" ];
         volumes = [
+          "nextcloud-root:/var/www/html"
           "nextcloud-apps:/var/www/html/custom_apps"
           "nextcloud-config:/var/www/html/config"
           "nextcloud-data:/var/www/html/data"
@@ -18,7 +19,7 @@
         environment = {
           POSTGRES_DB = "nextcloud";
           POSTGRES_USER = "nextcloud";
-          POSTGRES_HOST = "nextcloud-postgres";
+          POSTGRES_HOST = "localhost";
           OVERWRITEPROTOCOL = "https";
           TRUSTED_PROXIES = "127.0.0.1";
         };
@@ -34,8 +35,10 @@
       nginx = {
         image = "nginx:alpine";
         dependsOn = [ "nextcloud" ];
-        volumes =
-          [ "${./configs/nginx-nextcloud.conf}:/etc/nginx/nginx.conf:ro" ];
+        volumes = [
+          "nextcloud-root:/var/www/html:ro"
+          "${./configs/nginx-nextcloud.conf}:/etc/nginx/nginx.conf:ro"
+        ];
         extraOptions = [ "--volumes-from=nextcloud-nextcloud" ];
       };
 
diff --git a/configuration/services/webserver.nix b/configuration/services/webserver.nix
index c1966a5..d72b417 100644
--- a/configuration/services/webserver.nix
+++ b/configuration/services/webserver.nix
@@ -1,10 +1,14 @@
 { config, pkgs, ... }:
 
 {
-  users.extraUsers.webserver = {
-    uid = config.ids.uids.webserver;
-    isSystemUser = true;
-    description = "tlater.net web server user";
+  users = {
+    extraUsers.webserver = {
+      uid = config.ids.uids.webserver;
+      group = config.users.extraGroups.webserver.name;
+      isSystemUser = true;
+      description = "tlater.net web server user";
+    };
+    extraGroups.webserver = { gid = config.ids.gids.webserver; };
   };
 
   virtualisation.oci-containers.containers.webserver = {
@@ -16,10 +20,8 @@
       contents = pkgs.tlaternet-webserver.webserver;
 
       config = let
-        user = config.users.extraUsers.webserver;
-        group = config.users.groups.${user.group};
-        uid = toString user.uid;
-        gid = toString group.gid;
+        uid = toString config.users.extraUsers.webserver.uid;
+        gid = toString config.users.extraGroups.webserver.gid;
       in {
         Cmd = [ "tlaternet-webserver" ];
         Volumes = { "/srv/mail" = { }; };
diff --git a/flake.lock b/flake.lock
index 3be1860..11de3e3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1631561581,
-        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "lastModified": 1638122382,
+        "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
         "type": "github"
       },
       "original": {
@@ -38,11 +38,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1632990363,
-        "narHash": "sha256-SNqz+9Vt4yDHqw8u/CMFdzMQTulKoMlVGJdshfcb5O0=",
+        "lastModified": 1639240632,
+        "narHash": "sha256-BAXhgnPOW1COIfZ9EOOFTdolalYS73MFHSRajgrSdZw=",
         "owner": "nixos",
         "repo": "nixos-hardware",
-        "rev": "0a8b8054c9920368a3c15e6d766188fdf04b736f",
+        "rev": "2a7063461c3751d83869a2a0a8ebc59e34bec5b2",
         "type": "github"
       },
       "original": {
@@ -54,16 +54,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1633267966,
-        "narHash": "sha256-gFKvZ5AmV/dDTKXVxacPbXe4R0BsFpwtVaQxuIm2nnk=",
+        "lastModified": 1639161226,
+        "narHash": "sha256-75Y08ynJDTq6HHGIF+8IADBJSVip0UyWQH7jqSFnRR8=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "7daf35532d2d8bf5e6f7f962e6cd13a66d01a71d",
+        "rev": "573095944e7c1d58d30fc679c81af63668b54056",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-21.05",
+        "ref": "nixos-21.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index a7b1ef7..8a0025f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "tlater.net host configuration";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.11";
     nixos-hardware.url = "github:nixos/nixos-hardware/master";
     flake-utils.url = "github:numtide/flake-utils";
     tlaternet-webserver = {