Add Dockerfile and GitHub action (#211)

Builds a docker image and pushes to ghcr.io/diamondlightsource/python-zocalo

.github/workflows/build-and-push-docker-images.yml

@@ -0,0 +1,56 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - "dockerfile"
+      - "main"
+    tags:
+      - "v*.*.*"
+
+jobs:
+  docker:
+    if: ${{ github.repository == 'DiamondLightSource/python-zocalo' }}
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      # -
+      #   name: Login to Docker Hub
+      #   uses: docker/login-action@v2
+      #   with:
+      #     username: ${{ secrets.DOCKERHUB_USERNAME }}
+      #     password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=edge,branch=main
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.11-slim
+
+WORKDIR /zocalo
+
+RUN apt-get update && apt-get install -y curl
+RUN python -m pip install --upgrade pip
+
+COPY . .
+
+RUN python -m pip install --no-cache-dir .
+
+CMD ["zocalo.service"]

HISTORY.rst

@@ -4,6 +4,7 @@ History
 
 Unreleased
 ----------
+* Add Dockerfile and build-and-push-docker-image GitHub workflow
 
 0.26.0 (2022-11-04)
 -------------------