Fix error in `README.MD` about `http://localhost:8000/env`

README.MD

@@ -80,6 +80,6 @@ $ curl http://localhost:8000/health
 {"status":"healthy"}
 ```
 
-In debug mode (`DEBUG=true`), [http://localhost:8000/env](http://localhost:8000/env) will pretty-print the non-sensitive environment variables as JSON.
+In debug mode (`DEBUG=true`), [http://localhost:8000/api/v1/env](http://localhost:8000/api/v1/env) will pretty-print the non-sensitive environment variables as JSON.
 
 Uvicorn will restart the application automatically when any source files are changed.