Migrate to Github Actions (#91)

* Migrate to Github Actions

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/docker.yml

@@ -0,0 +1,81 @@
+name: Docker Build
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v*.*.*
+    paths-ignore:
+      - README.md
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - README.md
+
+jobs:
+  release:
+    runs-on: ubuntu-20.04
+    needs: build
+    if: ${{ github.ref_type == 'tag' }}
+
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Create Release
+        run: |
+          gh release create \
+             --generate-notes \
+             --title ${{ github.ref_name }} \
+             ${{ github.ref_name }}
+
+  build:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            ${{ github.repository }}
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern=v{{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        if: ${{ github.event_name != 'pull_request' }}
+        with:
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        if: ${{ github.event_name != 'pull_request' }}
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build
+        uses: docker/build-push-action@v2
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.labels }}
+          build-args: |
+            BRANCH=${{ github.ref_name }}
+            COMMIT=${{ github.sha }}