agregada configuracion nginx para UI para que acepte variables de entorno

ui/nginx.conf

@@ -0,0 +1,16 @@
+server {
+  listen 80;
+  server_name _;
+
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+
+  location /config.js {
+    add_header 'Access-Control-Allow-Origin' '*';
+    add_header 'Content-Type' 'application/javascript';
+  }
+}