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/yaml/dist/stringify/stringifyString.d.ts

@@ -0,0 +1,9 @@
+import { Scalar } from '../nodes/Scalar';
+import type { StringifyContext } from './stringify';
+interface StringifyScalar {
+    value: string;
+    comment?: string | null;
+    type?: string;
+}
+export declare function stringifyString(item: Scalar | StringifyScalar, ctx: StringifyContext, onComment?: () => void, onChompKeep?: () => void): string;
+export {};