Add instructions to readme

README.md

@@ -176,7 +176,7 @@ To get the application up and running you need to:
 CLIENT_HOST="http://localhost:5173"
 JWT_SECRET=<jwt_secret>
 DB_TYPE="MongoDB"
-DB_CONNECTION_STRING="mongodb://mongodb:27017/uptime_db"
+DB_CONNECTION_STRING="mongodb://<username>:<password>@mongodb:27017/uptime_db"
 REDIS_HOST="redis"
 REDIS_PORT=6379
 TOKEN_TTL="99d"
@@ -194,6 +194,13 @@ VITE_APP_API_BASE_URL="http://localhost:5000/api/v1"
 VITE_APP_API_LOG_LEVEL="debug"
 ```
 
+3.  In the `Dokcer` directory create a `mongo.env` file with a username and password:
+
+```
+USERNAME_ENV_VAR=user
+PASSWORD_ENV_VAR=password
+```
+
 4.  In the `Docker` directory run `docker compose up` to run the `docker-compose.yaml` file and start all four images.
 
 That's it, the application is ready to use on port 80.