Enhance backend API with health check endpoint and update environment script

- Added a new health check endpoint to the public router in index.ts, returning a simple status response.
- Updated update-docker-env.sh to include the MinIO Dashboard URL in the environment configuration and output messages.

worklenz-backend/src/routes/public/index.ts

@@ -5,5 +5,8 @@ import safeControllerFunction from "../../shared/safe-controller-function";
 const public_router = express.Router();
 
 public_router.post("/new-subscriber", safeControllerFunction(ClientsController.addSubscriber));
+public_router.get("/health", (req, res) => {
+    res.status(200).json({ status: "ok" });
+});
 
 export default public_router;