fix nginx connections issues

Author: ahmedkhaleel2004

backend/app/main.py

@@ -21,6 +21,7 @@
     allow_credentials=True,
     allow_methods=["GET", "POST"],
     allow_headers=["*"],
+    expose_headers=["Content-Type", "Content-Disposition"],
 )
 
 API_ANALYTICS_KEY = os.getenv("API_ANALYTICS_KEY")

backend/nginx/api.conf

@@ -15,6 +15,28 @@ server {
         proxy_pass http://127.0.0.1:8000;
         include proxy_params;
         proxy_redirect off;
+
+        # Add these new settings
+        proxy_buffering off;
+        proxy_http_version 1.1;
+        proxy_set_header Connection '';
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header Host $host;
+
+        # Increase timeouts
+        proxy_connect_timeout 300;
+        proxy_send_timeout 300;
+        proxy_read_timeout 300;
+        send_timeout 300;
+
+        # Add error handling
+        proxy_next_upstream error timeout http_500 http_502 http_503 http_504;
+        proxy_next_upstream_tries 2;
+
+        # Keep connection alive
+        keepalive_timeout 300;
+        keepalive_requests 100;
     }
 
     # Return 444 for everything else (no response, just close connection)
@@ -23,12 +45,6 @@ server {
         # keep access log on
     }
 
-    # Add timeout settings
-    proxy_connect_timeout 300;
-    proxy_send_timeout 300;
-    proxy_read_timeout 300;
-    send_timeout 300;
-
     listen 443 ssl; # managed by Certbot
     ssl_certificate /etc/letsencrypt/live/api.gitdiagram.com/fullchain.pem; # managed by Certbot
     ssl_certificate_key /etc/letsencrypt/live/api.gitdiagram.com/privkey.pem; # managed by Certbot