add Dockerfile, Docker-Compose example and build and push Image for G…

…itHub

.github/workflows/docker-compose.yml.example

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+version: '3.7'
+services:
+  porygon:
+    image: ghcr.io/roundaboutluke/porygon:main
+    container_name: porygon
+    restart: unless-stopped
+    volumes:
+      # mount the config.toml file and persistent storage for MessageIDs
+      - ${PWD}/config.toml:/porygon/config.toml
+      - ${PWD}/messageIDs.json:/porygon/messageIDs.json # file must be created before the first start the container (touch messageIDs.json)
+      # optional if you want to use your own template
+      # comment if not needed
+      - ${PWD}/current.override.json:/porygon/templates/current.override.json
+

.github/workflows/publish.yml

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+name: publish
+
+on: [push]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

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+# Build image
+FROM golang:1.21-alpine as build
+
+WORKDIR /go/src/app
+COPY go.mod go.sum ./
+RUN if [ ! -f vendor/modules.txt ]; then go mod download; fi
+
+COPY . .
+RUN CGO_ENABLED=0 go build -o /go/bin/porygon
+
+# Now copy it into our base image.
+FROM gcr.io/distroless/static-debian12 as runner
+COPY --from=build /go/bin/porygon /porygon/
+COPY default.toml /porygon/
+COPY /templates /porygon/templates
+
+WORKDIR /porygon
+CMD ["./porygon"]