Fix localdb for user services

[FooChao]

To be able to use local mongo db do the following steps

1. update user service .env file

• DB_LOCAL_URI=mongodb://root:example@localhost:27017
• ENV=LOCAL

2. on development do npm run local db before doing npm run dev
3. on docker do docker-compose --profile localdb up
4. to clean up do docker-compose --profile localdb down

Please note that normal docker compose down won't clean up the database and may cause some errors in future as i given it profile localdb for us to swap between local and cloud db

To swap back to cloud in future change .env file to ENV=PROD

mongo-express is at port 8081