feat: update `cog init` to include a GitHub Actions workflow file (#1671)
* update `cog init` to include an actions workflow file
Update init.go
make fmt
* fall back to `image` in cog.yaml, instead of repo vars
* Update pkg/cli/init-templates/.github/workflows/push.yaml
Co-authored-by: technillogue <technillogue@gmail.com>
Signed-off-by: Zeke Sikelianos <zeke@sikelianos.com>
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Signed-off-by: Zeke Sikelianos <zeke@sikelianos.com>
Co-authored-by: technillogue <technillogue@gmail.com>