chore: add docker deployment

.github/workflows/publish.yaml

@@ -0,0 +1,43 @@
+name: publish
+
+on: [push]
+env:
+  IMAGE_NAME: mailpress
+
+jobs:
+  # Push image to GitHub Packages.
+  # See also https://docs.docker.com/docker-hub/builds/
+  publish-container:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build image
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME
+
+      - name: Log into registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Push image
+        run: |
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
+
+          # Change all uppercase to lowercase
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "main" ] && VERSION=latest
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION
+
+# SPDX-License-Identifier: (EUPL-1.2)
+# Copyright © 2024 cronit KG

Dockerfile

@@ -0,0 +1,45 @@
+# Use the official Node.js 20 image as the base
+FROM node:20-alpine as base
+
+LABEL description="Offical docker image for Pylon services (Node.js)"
+LABEL org.opencontainers.image.source="https://github.com/getcronit/pylon"
+LABEL maintainer="[email protected]"
+
+WORKDIR /usr/src/pylon
+
+# install dependencies into a temp directory
+# this will cache them and speed up future builds
+FROM base AS install
+RUN mkdir -p /temp/dev
+COPY package.json package-lock.json /temp/dev/
+RUN cd /temp/dev && npm ci
+
+# install with --production (exclude devDependencies)
+RUN mkdir -p /temp/prod
+COPY package.json package-lock.json /temp/prod/
+RUN cd /temp/prod && npm ci --only=production
+
+# copy node_modules from temp directory
+# then copy all (non-ignored) project files into the image
+FROM install AS prerelease
+COPY --from=install /temp/dev/node_modules node_modules
+COPY . .
+
+# [optional] tests & build
+ENV NODE_ENV=production
+
+# Create .pylon folder (mkdir)
+RUN mkdir -p .pylon
+# RUN npm test
+RUN npm run pylon build
+
+# copy production dependencies and source code into final image
+FROM base AS release
+COPY --from=install /temp/prod/node_modules node_modules
+COPY --from=prerelease /usr/src/pylon/.pylon .pylon
+COPY --from=prerelease /usr/src/pylon/package.json .
+
+# run the app
+USER node
+EXPOSE 3000/tcp
+ENTRYPOINT [ "node", "/usr/src/pylon/.pylon/index.js" ]