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/@kwsites/file-exists/readme.md

@@ -0,0 +1,41 @@
+# @kwsites/file-exists
+
+Synchronous validation of a path existing either as a file or as a directory.
+
+```
+const { exists, FILE, FOLDER, READABLE } = require('@kwsites/file-exists');
+
+// check for a folder existing
+assert(exists(__dirname, FOLDER));
+assert(!exists(__filename, FOLDER));
+
+// check for a file existing
+assert(!exists(__filename, FILE));
+assert(exists(__filename, FILE));
+
+// when no type is specified, both folders and files are allowed
+assert(exists(__dirname));
+assert(exists(__filename));
+
+// alternatively specify both files and folders
+assert(exists(__dirname, FILE + FOLDER));
+
+// or just that the path is readable (can be either a file or folder)
+assert(exists(__filename, READABLE));
+```
+
+## Troubleshooting
+
+This library uses [debug](https://www.npmjs.com/package/debug) to handle logging,
+to enable logging, use either the environment variable:
+
+```
+"DEBUG=@kwsites/file-exists" node ./your-app.js 
+``` 
+
+Or explicitly enable logging using the `debug` library itself:
+
+```javascript
+require('debug').enable('@kwsites/file-exists');
+``` 
+