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/@istanbuljs/load-nyc-config/load-esm.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const {pathToFileURL} = require('url');
+
+module.exports = async filename => {
+	const mod = await import(pathToFileURL(filename));
+	if ('default' in mod === false) {
+		throw new Error(`${filename} has no default export`);
+	}
+
+	return mod.default;
+};