Improve localnet docs in CONTRIBUTING.md

CONTRIBUTING.md

@@ -42,16 +42,27 @@ $ uv sync --upgrade-package bittensor --upgrade-package requests==2.0.0
 
 ## Running Locally for Development
 
-For local development, we suggest running a [local devnet node](https://github.com/inference-labs-inc/bittensor-devnet).
-
-### Miner
-
-```sh
-python ./neurons/miner.py --localnet
-```
-
-### Validator
-
-```sh
-python ./neurons/validator.py --localnet
-```
+For local development, we recommend using our devcontainer which provides a pre-configured development environment. The devcontainer image is pulled from `ghcr.io/inference-labs-inc/bittensor-devcontainer:latest`.
+
+1. Create the `~/.bittensor/omron` directory on your host machine if it doesn't exist
+2. Open the project in VS Code with the Dev Containers extension installed
+3. VS Code will prompt you to "Reopen in Container" - click this to start the devcontainer
+4. Once the container starts, run:
+   ```sh
+   uv sync
+   ```
+   This will create and activate a virtual environment in `.venv`
+5. In separate terminal windows, run:
+
+   ```sh
+   # Terminal 1: Start the local subnet
+   start_localnet.sh
+
+   # Terminal 2: Start the miner
+   python neurons/miner.py --localnet
+
+   # Terminal 3: Start the validator
+   python neurons/validator.py --localnet
+   ```
+
+Note: btcli is pre-configured to use `ws://127.0.0.1:9944` in `~/.bittensor/config.yml`