feat: add easy-dataset and mongodb-replicaset-single

src/mongodb-replicaset/README.md

@@ -20,24 +20,16 @@ This service sets up a MongoDB replica set with three members.
    docker compose up -d
    ```
 
-2. Connect to the primary node:
+   The services will automatically initialize the replica set through the `mongo-init` init container. This container:
+   - Waits for all MongoDB nodes to be healthy
+   - Connects to the primary node
+   - Initializes the replica set with internal container names
+   - Uses container-based networking for communication
+
+2. Verify the replica set status:
 
    ```bash
-   docker exec -it mongodb-replicaset-mongo1-1 mongosh
-   ```
-
-3. Initialize the replica set. **Remember to replace the host IP with your actual host IP.**
-
-   ```js
-   config = {
-     _id: "rs0",
-     members: [
-       {_id: 0, host: "192.168.31.38:27017"},
-       {_id: 1, host: "192.168.31.38:27018"},
-       {_id: 2, host: "192.168.31.38:27019"},
-     ]
-   }
-   rs.initiate(config)
+   docker exec -it mongodb-replicaset-mongo1-1 mongosh -u root -p password --authenticationDatabase admin --eval "rs.status()"
    ```
 
 ## Services