Automatic Docker builds (#73)

* add docker files

* add action to build docker file and publish it as a package

* point to published docker image in example docker-compose.yml

.github/workflows/publish-docker.yml

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+name: build-and-publish-docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  push:
+    branches: ["master"]
+
+  pull_request:
+    branches: ["master"]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v3
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Clean container registry
+        uses: actions/delete-package-versions@v4
+        with:
+          package-name: "elk-live"
+          package-type: "container"
+          min-versions-to-keep: 3
+          token: ${{ secrets.GITHUB_TOKEN }}

Dockerfile

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+FROM alpine:latest
+
+LABEL authors="Arnd Plumhoff <[email protected]>, Sascha Hoppe <[email protected]>"
+
+ARG ELKLIVE_UID=1002
+
+RUN apk add --update --no-cache yarn git gradle curl
+
+RUN adduser elklive -h /elklive -D -u ${ELKLIVE_UID}
+
+USER elklive
+
+RUN git clone https://github.com/kieler/elk-live --depth=1 /elklive
+
+WORKDIR "/elklive/client"
+RUN yarn install && yarn run build
+
+WORKDIR "/elklive/server"
+RUN ./gradlew build
+
+EXPOSE 8080
+
+CMD ["./gradlew", "jettyRun", "--args='-m=SIGTERM'"]

docker-compose.yml

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+version: "2"
+
+services: 
+  elkweb: 
+    container_name: elkweb
+    image: ghcr.io/kieler/elk-live:master
+    ports: 
+      - 8082:8080
+    restart: unless-stopped
+    cpus: 0.5
+    mem_limit: 536870912
+    healthcheck:
+      test: curl --fail http://localhost:8080 || exit 1
+      interval: 60s
+      start_period: 2m