ci: use GitHub workflow and container registry

Author: olljanat

.github/workflows/ci.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches:
+     - master
+  # pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build & push Docker image
+    runs-on: ubuntu-latest
+    env:
+      GHCR_TOKEN: ${{ secrets.GHCR_TOKEN }}
+
+    steps:
+      - name: Checkout repository with submodules
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Log in to GitHub Container Registry
+        run: echo "${GHCR_TOKEN}" | docker login ghcr.io -u "mistcommunity-bot" --password-stdin
+
+      - name: Build Docker image
+        run: |
+          docker pull mist/python3
+          docker build --rm -t ghcr.io/${GITHUB_REPOSITORY_OWNER##*/}/tests:${GITHUB_SHA} \
+            --build-arg API_VERSION_SHA=${{ github.sha }} \
+            --build-arg API_VERSION_NAME=${{ github.ref_name }} .
+          docker push ghcr.io/${GITHUB_REPOSITORY_OWNER##*/}/tests:${GITHUB_SHA}
+          docker tag ghcr.io/${GITHUB_REPOSITORY_OWNER##*/}/tests:${GITHUB_SHA} ghcr.io/${GITHUB_REPOSITORY_OWNER##*/}/tests:latest
+          docker push ghcr.io/${GITHUB_REPOSITORY_OWNER##*/}/tests:latest
+
+  # flake8:
+  #   name: Lint with flake8
+  #   runs-on: ubuntu-latest
+  #   needs: build
+  #   container:
+  #     image: registry.ops.mist.io/mistio/mist.tests:${{ github.sha }}
+  #     credentials:
+  #       username: ${{ secrets.CI_REGISTRY_USER }}
+  #       password: ${{ secrets.CI_REGISTRY_PASSWORD }}
+  #   defaults:
+  #     run:
+  #       working-directory: /mist.tests/
+  #   steps:
+  #     - name: Run flake8 checks
+  #       run: |
+  #         flake8 misttests/integration/api/mistrequests.py
+  #         flake8 misttests/integration/api/main/secrets.py
+  #         flake8 misttests/integration/api/utils.py
+  #         flake8 misttests/integration/gui/steps/browser.py
+  #         flake8 misttests/integration/gui/steps/images.py
+  #         flake8 misttests/integration/gui/steps/networks.py
+  #         flake8 misttests/integration/gui/steps/org_context.py
+  #         flake8 misttests/integration/gui/steps/popups.py
+  #         flake8 misttests/integration/gui/steps/scroll.py
+  #         flake8 misttests/integration/gui/steps/setup.py
+  #         flake8 misttests/integration/gui/steps/team.py