This is currently a very rudimentary setup. Some manual steps are still needed for initializing a codespace.

1. The base container is codespaces-linux. It comes with a variety of tools preinstalled, including git, nvm, yarn, etc.
2. On top of that, the container also installs:
   • arc
   • pyenv and Python 3.7.4 (as mentioned in the contributing guide)

1. Follow the instructions to create a codespace
2. (Optional) Connect to your codespace in VS Code
3. Follow the manual steps below

1. (Only needed if you use Phabricator) Install Arcanist Credentials: arc install-certificate
2. Create and activate a virtualenv:

$ pyenv virtualenv 3.7.4 dagster-3.7.4
$ pyenv activate dagster-3.7.4

3. Run make dev_install at the root of the repository and follow the contributing guide