Add health proxy service and Nginx configuration for health checks

nginx.conf

@@ -0,0 +1,40 @@
+user  nginx;
+worker_processes  1;
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    sendfile        on;
+    keepalive_timeout  65;
+
+    server {
+        listen       80;
+        server_name  localhost;
+
+        # Health proxy endpoint - forwards to internal python service
+        location /healthcheck {
+            proxy_pass http://health-proxy:8081$request_uri;
+            proxy_http_version 1.1;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_connect_timeout 3s;
+            proxy_read_timeout 5s;
+        }
+
+        # Serve static files
+        location / {
+            root   /usr/share/nginx/html;
+            try_files $uri $uri/ =404;
+        }
+
+        error_page  404 /404.html;
+    }
+}