Fix production Docker runtime for server deployment

docker/nginx/default.conf

@@ -1,7 +1,7 @@
 server {
     listen 80;
     server_name _;
-    root /var/www/html/public;
+    root /var/www/public;
     index index.php index.html;
 
     client_max_body_size 20M;
@@ -14,8 +14,8 @@ server {
         include fastcgi_params;
         fastcgi_pass app:9000;
         fastcgi_index index.php;
-        fastcgi_param SCRIPT_FILENAME /var/www/html/public$fastcgi_script_name;
-        fastcgi_param DOCUMENT_ROOT /var/www/html/public;
+        fastcgi_param SCRIPT_FILENAME /var/www/public$fastcgi_script_name;
+        fastcgi_param DOCUMENT_ROOT /var/www/public;
         fastcgi_read_timeout 300;
     }