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/ensure/index.js

@@ -0,0 +1,23 @@
+'use strict'
+
+const { createFile, createFileSync } = require('./file')
+const { createLink, createLinkSync } = require('./link')
+const { createSymlink, createSymlinkSync } = require('./symlink')
+
+module.exports = {
+  // file
+  createFile,
+  createFileSync,
+  ensureFile: createFile,
+  ensureFileSync: createFileSync,
+  // link
+  createLink,
+  createLinkSync,
+  ensureLink: createLink,
+  ensureLinkSync: createLinkSync,
+  // symlink
+  createSymlink,
+  createSymlinkSync,
+  ensureSymlink: createSymlink,
+  ensureSymlinkSync: createSymlinkSync
+}