get default from git config to fix #83 (#86)

Author: deven96

doc-site/docs/about/module-life-cycle.md

@@ -26,7 +26,7 @@ _Run once only during `zero apply`_
 ## On-going
 ### Pull request
 - Unit test
-### Push to master branch
+### Push to master/main branch
 - Unit test
 - Build docker image
 - Deploy image to Staging cluster using Kustomize

scripts/gha-setup.sh

@@ -34,7 +34,7 @@ EOF
 	## Branch Protect for PRs
 	## By default we setup Pull-request checks of [lint, unit-test] in `.github/workflows/pull-request.yml`
 	## And we will enforce both the checks pass before PR can be merged into default branch
-	DEFAULT_BRANCH=master
+	DEFAULT_BRANCH=`git config --get init.defaultBranch || echo main`
 	curl -XPUT "https://api.github.com/repos/$GITHUB_ORG/$GITHUB_REPO/branches/$DEFAULT_BRANCH/protection" \
 	--header "Authorization: token $GITHUB_ACCESS_TOKEN" \
 	--header 'Content-Type: application/json' \

templates/.circleci/config.yml

@@ -291,7 +291,7 @@ workflows:
             filters:
               branches:
                 only:  # only branches matching the below regex filters will run
-                  - /^master$/
+                  - /^(master|main)$/
 
         - deploy:
             name: deploy_staging