maintenance: refactor CI scripts and simplify github CI workflows (#1337)

* refactor github actions to have one file for PR/Push
* only run release actions on staging branch with the defined tag
* renaming script extension of bash scripts to .bash
* shellcheck

Author: sanderegg

.github/workflows/ci-release.yml

@@ -2,8 +2,6 @@ name: Github-CI-Release
 
 on:
   push:
-    branches:
-      - staging
     tags:
       - v[0-9]+.[0-9]+.[0-9]+
 
@@ -15,6 +13,8 @@ env:
 
 jobs:
   deploy:
+    # only run on staging branch
+    if: github.event.base_ref == 'ref/heads/staging'
     name: deploy release
     runs-on: ubuntu-latest
     env:
@@ -24,10 +24,10 @@ jobs:
       - name: setup-docker
         uses: docker-practice/[email protected]
       - name: setup docker-compose
-        run: sudo ./ci/github/helpers/setup_docker_compose.sh
+        run: sudo ./ci/github/helpers/setup_docker_compose.bash
       - name: set owner variable
         run: echo ::set-env name=OWNER::${GITHUB_REPOSITORY%/*}
       - name: set git tag
         run: echo ::set-env name=GIT_TAG::${GITHUB_REF##*/}
       - name: deploy
-        run: ./ci/deploy/dockerhub-release
+        run: ./ci/deploy/dockerhub-release.bash