From 8358f4a413c2abcbe2a6022238a0c98c6af44d30 Mon Sep 17 00:00:00 2001
From: Your Name <119736744+aborayan2022@users.noreply.github.com>
Date: Thu, 19 Mar 2026 03:42:55 +0200
Subject: [PATCH] refactor: Replace hardcoded backend references with variable
 for improved maintainability

---
 nginx/nginx.conf      | 10 ++++------
 nginx/nginx.prod.conf | 12 +++++-------
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index a913cde..a4234b6 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -1,7 +1,3 @@
-upstream backend {
-    server backend:5000;
-}
-
 upstream frontend {
     server frontend:5173;
 }
@@ -25,6 +21,8 @@ server {
     listen 443 ssl;
     server_name dociva.io www.dociva.io;
     client_max_body_size 100M;
+    resolver 127.0.0.11 valid=30s ipv6=off;
+    set $backend_upstream backend:5000;
 
     # SSL certificates (Let's Encrypt)
     ssl_certificate /etc/letsencrypt/live/dociva.io/fullchain.pem;
@@ -44,7 +42,7 @@ server {
 
     # API requests → Flask backend
     location /api/ {
-        proxy_pass http://backend;
+        proxy_pass http://$backend_upstream;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -68,6 +66,6 @@ server {
 
     # Health check
     location /health {
-        proxy_pass http://backend/api/health;
+        proxy_pass http://$backend_upstream/api/health;
     }
 }
diff --git a/nginx/nginx.prod.conf b/nginx/nginx.prod.conf
index 0d7fdad..ea4dc17 100644
--- a/nginx/nginx.prod.conf
+++ b/nginx/nginx.prod.conf
@@ -1,7 +1,3 @@
-upstream backend {
-    server backend:5000;
-}
-
 server {
     listen 80;
     server_name dociva.io www.dociva.io;
@@ -37,6 +33,8 @@ server {
     http2 on;
     server_name dociva.io;
     client_max_body_size 100M;
+    resolver 127.0.0.11 valid=30s ipv6=off;
+    set $backend_upstream backend:5000;
 
     # SSL certificates (Let's Encrypt via certbot)
     ssl_certificate /etc/letsencrypt/live/dociva.io/fullchain.pem;
@@ -69,7 +67,7 @@ server {
 
     # SSE streaming for assistant chat
     location /api/assistant/chat/stream {
-        proxy_pass http://backend;
+        proxy_pass http://$backend_upstream;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -85,7 +83,7 @@ server {
 
     # API requests → Flask
     location /api/ {
-        proxy_pass http://backend;
+        proxy_pass http://$backend_upstream;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -109,6 +107,6 @@ server {
 
     # Health check
     location /health {
-        proxy_pass http://backend/api/health;
+        proxy_pass http://$backend_upstream/api/health;
     }
 }