feat: update Dockerfile and nginx configuration for improved API routing; modify events API response structure

nest-front/nginx.conf

@@ -3,8 +3,12 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    # Use Docker's embedded DNS resolver; defer resolution to request time
+    resolver 127.0.0.11 valid=30s;
+
     location /api/ {
-        proxy_pass ${API_URL}/api/;
+        set $api_upstream http://api:3000;
+        proxy_pass $api_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;