Add healthcheck and attempt to fix devcontainer

user was root instead of vscode, and pi was broken.
Claude code had gone missing

.devcontainer/Dockerfile

@@ -24,4 +24,7 @@ RUN /home/vscode/.local/bin/mise exec -- mix local.hex --force && \
 
 RUN npm install -g @mariozechner/pi-coding-agent
 
-USER root
+RUN npm install -g @anthropic-ai/claude-code
+
+RUN echo 'eval "$(/home/vscode/.local/bin/mise activate bash)"' >> /home/vscode/.bashrc
+RUN /home/vscode/.local/bin/mise settings set trusted_config_paths /workspaces/firehose