Move deb packing under deb folder (#12)

.github/workflows/deb.yaml

@@ -0,0 +1,53 @@
+name: build
+
+on:
+  push:
+    branches:
+      - master
+      - dev
+    paths:
+      - .github/workflows/deb.yaml
+      - deb/*
+  pull_request:
+    paths:
+      - .github/workflows/deb.yaml
+      - deb/*
+
+env:
+  DOCKER_REPO: shenxn/protonmail-bridge
+  DOCKER_REPO_DEV: shenxn/protonmail-bridge-dev
+
+jobs:
+  deb:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Set version
+        id: version
+        run: echo "::set-output name=version::`cat deb/VERSION`"
+      - name: Set repo
+        id: repo
+        run: if [[ $GITHUB_REF == "refs/heads/master" ]]; then echo "::set-output name=repo::${DOCKER_REPO}"; else echo "::set-output name=repo::${DOCKER_REPO_DEV}"; fi
+      - name: Docker meta
+        id: docker_meta
+        uses: crazy-max/ghaction-docker-meta@v1
+        with:
+          images: ${{ steps.repo.outputs.repo }}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        if: ${{ github.event_name != 'pull_request' }}
+        with:
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+      - uses: docker/build-push-action@v2
+        with:
+          context: ./deb
+          file: ./deb/Dockerfile
+          tags: |
+            ${{ steps.repo.outputs.repo }}:latest
+            ${{ steps.repo.outputs.repo }}:${{ steps.version.outputs.version }}
+          labels: ${{ steps.docker_meta.outputs.labels }}
+          push: ${{ github.event_name != 'pull_request' }}