.dockerignore and docker_ci.yml

.dockerignore

@@ -0,0 +1,3 @@
+.git
+data
+dist

.github/workflows/docker_ci.yml

@@ -0,0 +1,40 @@
+name: CI to Docker Hub
+on:
+  push:
+    branches: [ main ]
+    paths-ignore:
+      - ".github/**"
+      - ".dockerignore"
+      - ".gitignore"
+      - "README.md"
+      - "docs/**"
+      - "init/**"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          file: ./Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/lenpaste:latest
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}