Use two Dockerfiles, move Docker stuff to /docker

docker/nginx/leftypol.conf

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+upstream php-upstream {
+    server php:9000;
+}
+
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server ipv6only=on;
+    server_name leftypol;
+    root /var/www-leftypol;
+    add_header X-Frame-Options "SAMEORIGIN";
+    add_header X-Content-Type-Options "nosniff";
+
+    index index.html index.php;
+
+    charset utf-8;
+
+    location ~ ^([^.\?]*[^\/])$ {
+       try_files                 $uri @addslash;
+    }
+
+    # Expire rules for static content
+    # Media: images, icons, video, audio, HTC
+    location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ {
+    	expires 1M;
+    	access_log off;
+    	log_not_found off;
+    	add_header Cache-Control "public";
+    }
+    # CSS and Javascript
+    location ~* \.(?:css|js)$ {
+    	expires 1y;
+    	access_log off;
+    	log_not_found off;
+    	add_header Cache-Control "public";
+    }
+
+    location ~* \.(html)$ {
+        expires -1;
+    }
+
+    location @addslash {
+       return                    301 $uri/;
+    }
+
+    location / {
+         try_files $uri $uri/ /index.php$is_args$args;
+    }
+
+    client_max_body_size 2G;
+
+    location ~ \.php$ {
+        proxy_set_header X-Real-IP  $remote_addr;
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Request-Id $x_request_id;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_set_header Forwarded-Request-Id $x_request_id;
+        fastcgi_pass php-upstream;
+        fastcgi_index index.php;
+        fastcgi_buffers 16 16k;
+        fastcgi_buffer_size 32k;
+        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
+        fastcgi_read_timeout 600;
+        include fastcgi_params;
+    }
+
+    location = /favicon.ico { access_log off; log_not_found off; }
+    location = /robots.txt  { access_log off; log_not_found off; }
+}