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/call-bind-apply-helpers/applyBind.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var bind = require('function-bind');
+var $apply = require('./functionApply');
+var actualApply = require('./actualApply');
+
+/** @type {import('./applyBind')} */
+module.exports = function applyBind() {
+	return actualApply(bind, $apply, arguments);
+};