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/prompts/index.js

@@ -0,0 +1,14 @@
+function isNodeLT(tar) {
+  tar = (Array.isArray(tar) ? tar : tar.split('.')).map(Number);
+  let i=0, src=process.versions.node.split('.').map(Number);
+  for (; i < tar.length; i++) {
+    if (src[i] > tar[i]) return false;
+    if (tar[i] > src[i]) return true;
+  }
+  return false;
+}
+
+module.exports =
+  isNodeLT('8.6.0')
+    ? require('./dist/index.js')
+    : require('./lib/index.js');