fix: revert nginx.conf to HTTP for CI - HTTPS applied at runtime by deploy job

app/frontend/nginx.conf

@@ -1,27 +1,10 @@
-# Redirect HTTP to HTTPS
 server {
     listen 80;
-    server_name taskflow.lizzycloudlab.online lizzycloudlab.online;
-    return 301 https://$host$request_uri;
-}
-
-# HTTPS server
-server {
-    listen 443 ssl;
-    server_name taskflow.lizzycloudlab.online lizzycloudlab.online;
-
-    ssl_certificate     /etc/letsencrypt/live/taskflow.lizzycloudlab.online/fullchain.pem;
-    ssl_certificate_key /etc/letsencrypt/live/taskflow.lizzycloudlab.online/privkey.pem;
-
-    ssl_protocols       TLSv1.2 TLSv1.3;
-    ssl_ciphers         HIGH:!aNULL:!MD5;
-
     location / {
         root /usr/share/nginx/html;
         index index.html;
         try_files $uri $uri/ /index.html;
     }
-
     location /api/ {
         proxy_pass http://backend:3000;
         proxy_http_version 1.1;