fix: Update nginx config to use dynamic DNS resolution

- Replace upstream blocks with resolver directive
- Use variables for backend addresses to avoid startup errors
- Simplify configuration with single server block
- Add health check endpoint

server/api/node_modules/util-deprecate/node.js

@@ -0,0 +1,6 @@
+
+/**
+ * For Node.js, simply re-export the core `util.deprecate` function.
+ */
+
+module.exports = require('util').deprecate;