Shortened the nginx proxy timeouts.

web/docker/nginx-default.conf

@@ -12,7 +12,13 @@ server {
     location /api {
         proxy_pass http://flask:5000 ;
         rewrite ^/api/(.*) /$1 break ;
+        # NOTE: The frontend and backend containers will be running on the same host. If we can't connect
+        # within a few seconds, something's wrong and there's nothing to be gained by having longer timeouts.
+        proxy_connect_timeout 10 ;
+        proxy_read_timeout 10 ;
+        proxy_send_timeout 10 ;
     }
+
     location /user {
         proxy_pass http://flask:5000 ;
         rewrite ^/user/(.*) /user-files/$1 break ;