fix(nginx): use direct IP for Prometheus proxy

docker/nginx.conf

@@ -102,7 +102,7 @@ http {
 
         # Prometheus UI
         location /prometheus/ {
-            proxy_pass http://prometheus/prometheus/;
+            proxy_pass http://127.0.0.1:9090/prometheus/;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;