chore: update README.md with local mongo setup changes

README.md

@@ -28,7 +28,7 @@ We require fully qualified schemas. You can find how the unqualified should be t
 Start the database, you can use docker for that in the following way:
 
 ```sh
-docker run --name mongo -p 4000:27017 -d mongo:6.0
+docker compose up -d mongo mongo-replica-setup
 ```
 
 You can change port but don't forget to update the `.env`.
@@ -116,7 +116,7 @@ cp .env.example .env.test
 Start the database, you can use docker for that in the following way:
 
 ```sh
-docker run --name mongo -p 4000:27017 -d mongo:6.0
+docker compose up -d mongo mongo-replica-setup
 ```
 
 Now, you can run tests:

packages/backend/.env.example

@@ -1,7 +1,7 @@
 PORT=3000
 URL=http://localhost
 FRONTEND_URL=http://localhost:3001
-DB_CONNECTION_STRING=mongodb://localhost:4000?directConnection=true
+DB_CONNECTION_STRING=mongodb://mongo:mongo@localhost:27017?directConnection=true
 DB_NAME=test_registry
 LOGGER_LOG_LEVEL=debug
 LOGGER_OUTPUT_FORMAT=json