chore: Remove SSL cert handling - use external reverse proxy

- Nginx now listens on HTTP only (port 80)
- Remove SSL cert volume mounts from docker-compose
- Remove SSL troubleshooting sections
- Update docs to indicate SSL handled by Caddy/reverse proxy
- Simplify nginx.conf to remove HTTPS server block

docker/nginx/nginx.conf

@@ -33,35 +33,10 @@ http {
         server backend:3001;
     }
 
-    # HTTP server - redirect to HTTPS
+    # HTTP server (Caddy handles SSL termination)
     server {
         listen 80;
-        server_name coop.hobokenchicken.com;
-        
-        location /.well-known/acme-challenge/ {
-            root /var/www/certbot;
-        }
-        
-        location / {
-            return 301 https://$server_name$request_uri;
-        }
-    }
-
-    # HTTPS server
-    server {
-        listen 443 ssl http2;
-        server_name coop.hobokenchicken.com;
-
-        # SSL certificates (replace with your actual certificates)
-        ssl_certificate /etc/nginx/ssl/cert.pem;
-        ssl_certificate_key /etc/nginx/ssl/key.pem;
-
-        # SSL settings
-        ssl_protocols TLSv1.2 TLSv1.3;
-        ssl_ciphers HIGH:!aNULL:!MD5;
-        ssl_prefer_server_ciphers on;
-        ssl_session_cache shared:SSL:10m;
-        ssl_session_timeout 10m;
+        server_name _;
 
         # Security headers
         add_header X-Frame-Options "SAMEORIGIN" always;