workflow: add testing-env image build/publish process (#1780)

* workflow: add testing-env image build/publish process

replacing https://hub.docker.com/r/runatlantis/testing-env

Signed-off-by: Rui Chen <rui@chenrui.dev>

* refresh the testing-env image

* only runs on master branch

Signed-off-by: Rui Chen <rui@chenrui.dev>

.github/workflows/test.yml

@@ -4,10 +4,10 @@ jobs:
   test:
     name: runner / gotest
     runs-on: ubuntu-latest
-    container: ghcr.io/runatlantis/testing-env:805e94e7f648eddb0484e539a7b51410d39529bc
+    container: ghcr.io/runatlantis/testing-env:2021.08.31
     steps:
       # user in image needs write access to do anything
       - name: setup
         run: sudo chmod -R 777 $GITHUB_WORKSPACE /github /__w/_temp
       - uses: actions/checkout@v2
-      - run: make test-all
+      - run: make test-all

.github/workflows/testing-env-image.yml

@@ -0,0 +1,35 @@
+name: testing-env-image
+
+on:
+  push:
+    paths:
+      - ./testing/**
+      - .github/workflows/testing-env-image.yml
+    branches:
+      - "master"
+  workflow_dispatch:
+
+defaults:
+  run:
+    working-directory: testing
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Login to Packages Container registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - run: echo "TODAY=$(date +"%Y.%m.%d")" >> $GITHUB_ENV
+    - name: build testing-env:${{env.TODAY}} image
+      run: |
+        docker build -t ghcr.io/runatlantis/testing-env:${{env.TODAY}} .
+    - name: publish testing-env:${{env.TODAY}} image
+      run: |
+        docker push ghcr.io/runatlantis/testing-env:${{env.TODAY}}
+        docker tag ghcr.io/runatlantis/testing-env:${{env.TODAY}} ghcr.io/runatlantis/testing-env:latest
+        docker push ghcr.io/runatlantis/testing-env:latest