Add github actions

.github/workflows/docker.yaml

@@ -0,0 +1,37 @@
+name: Docker Build
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+
+jobs:
+  docker_build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to Github Packages
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Set tag environment variable
+        id: set-tag
+        run: |
+          echo "TAG_SLUG=${GITHUB_REF_NAME}-${GITHUB_SHA:0:7}-$(date +%s)" >> "$GITHUB_OUTPUT"
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ghcr.io/chpwssn/us-api:${{steps.set-tag.outputs.TAG_SLUG}}
+      - name: Image digest
+        run: 'echo TAG: ghcr.io/chpwssn/us-api:${{steps.set-tag.outputs.TAG_SLUG}} SHA: ${{ steps.docker_build.outputs.digest }}'
+