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/fs-extra/lib/output-file/index.js

@@ -0,0 +1,31 @@
+'use strict'
+
+const u = require('universalify').fromPromise
+const fs = require('../fs')
+const path = require('path')
+const mkdir = require('../mkdirs')
+const pathExists = require('../path-exists').pathExists
+
+async function outputFile (file, data, encoding = 'utf-8') {
+  const dir = path.dirname(file)
+
+  if (!(await pathExists(dir))) {
+    await mkdir.mkdirs(dir)
+  }
+
+  return fs.writeFile(file, data, encoding)
+}
+
+function outputFileSync (file, ...args) {
+  const dir = path.dirname(file)
+  if (!fs.existsSync(dir)) {
+    mkdir.mkdirsSync(dir)
+  }
+
+  fs.writeFileSync(file, ...args)
+}
+
+module.exports = {
+  outputFile: u(outputFile),
+  outputFileSync
+}