* Add a codespace config based on gitpod dockerfile
This will ensure contributors using Github Codespaces also have to
correct environemnt setup, with all packages installed.
* chore: rename Dockerfile
Co-authored-by: Nate Moore <nate@astro.build>
* install latest pnpm version in docker image
* Add astro-build vscode extension in Gitpod setup
* automatically open preview when port 3000 is used
* run astro build during prebuild
* Run starter demo when starting this workspace
* and $ASTRO_NEW to run specific example
* open index.astro of selected project
* Add sleep 1 before running code command
* use `gp await-port` instead of sleep
