Completely untie the backend from the frontend.

Build nginx and mariadb together with the app image.
Upgrade docker-compose configuration to 3 version.
Add cleanup step to the gitlab-ci.

docker/nginx/account.ely.by.conf.template

@@ -0,0 +1,66 @@
+server {
+    listen 80;
+
+    set $root_path     '/var/www/html';
+    set $frontend_path '${root_path}/frontend';
+
+    root    $root_path;
+    charset utf-8;
+
+    add_header X-Frame-Options "sameorigin" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header X-Content-Type-Options "nosniff" always;
+
+    # You can uncomment the next lines to enable debug mode
+    # rewrite_log on;
+    # error_log /var/log/nginx/error.log debug;
+
+    set $request_url $request_uri;
+    set $host_with_uri '${host}${request_uri}';
+
+    if ($host_with_uri ~ '^${AUTHSERVER_HOST}/auth') {
+        set $request_url '/api/authserver${request_uri}';
+        rewrite ^/auth /api/authserver$uri last;
+    }
+
+    if ($host_with_uri ~ '^${AUTHSERVER_HOST}/session') {
+        set $request_url '/api/minecraft${request_uri}';
+        rewrite ^/session /api/minecraft$uri last;
+    }
+
+    if ($host_with_uri ~ '^${AUTHSERVER_HOST}/api/(user|profiles)') {
+        set $request_url '/api/mojang${request_uri}';
+        rewrite ^/api/(user|profiles) /api/mojang$uri last;
+    }
+
+    location / {
+        root       $frontend_path;
+        access_log off;
+        etag       on;
+        expires    $cache_duration;
+        try_files  $uri /index.html =404;
+    }
+
+    location /api {
+        try_files $uri /api/index.php$is_args$args;
+    }
+
+    location /images/emails/assets {
+        alias '${root_path}/vendor/ely/email-renderer/dist/assets';
+        access_log off;
+    }
+
+    location ~* \.php$ {
+        fastcgi_pass  php; # Use generated upstream. See generate-upstream.sh
+        fastcgi_index /index.php;
+        fastcgi_cache cache;
+
+        include       fastcgi_params;
+
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_param REQUEST_URI $request_url;
+        fastcgi_param REMOTE_ADDR $http_x_real_ip;
+        # Override HTTPS param to handle ssl from nginx-proxy container
+        fastcgi_param HTTPS $http_x_forwarded_ssl if_not_empty;
+    }
+}