message: Update .devcontainer/devcontainer.json
diff: "name": "Primer Components",
  "image": "mcr.microsoft.com/vscode/devcontainers/javascript-node:12",
  "forwardPorts": [8000],
  - "postCreateCommand": "pushd docs && yarn && popd && yarn"
  + "postCreateCommand": ["/bin/bash", "-c", "pushd docs && yarn && popd && yarn"]
  }
  