Migrate to alpine

.github/workflows/build-docker.yml

@@ -1,60 +1,43 @@
+name: Create and publish a Docker image
 
-name: Main Branch CI
-
-# For all pushes to the main branch run the tests and push the image to the
-# GitHub registry under an edge tag so we can use it for the nightly
-# integration tests
 on:
   push:
-    branches: [master]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  docker:
+  build-and-push-image:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Prepare
-        id: prep
-        run: |
-          DOCKER_IMAGE=ghcr.io/metcalfc/docker-action-examples
-          VERSION=edge
-          if [[ $GITHUB_REF == refs/tags/* ]]; then
-            VERSION=${GITHUB_REF#refs/tags/v}
-          fi
-          if [ "${{ github.event_name }}" = "schedule" ]; then
-            VERSION=nightly
-          fi
-          TAGS="${DOCKER_IMAGE}:${VERSION}"
-          if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
-            TAGS="$TAGS,${DOCKER_IMAGE}:latest"
-          fi
-          echo ::set-output name=tags::${TAGS}
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v1
+      - name: Checkout repository
+        uses: actions/checkout@v3
 
-      - name: Cache Docker layers
-        uses: actions/cache@v2
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-buildx-
-      - name: Login to ghcr
-        if: github.event_name != 'pull_request'
-        uses: docker/login-action@v1
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
         with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.PAT_TOKEN }}
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
 
-      - name: Build and push
-        id: docker_build
-        uses: docker/build-push-action@v2
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
-          builder: ${{ steps.buildx.outputs.name }}
-          context: ./
-          file: ./Dockerfile
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.prep.outputs.tags }}
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,8 +1,33 @@
-FROM archlinux:base-devel
-RUN pacman -Sy --noconfirm && pacman -S --noconfirm binwalk file go perl-image-exiftool
-WORKDIR /go/src/app
+FROM --platform=$BUILDPLATFORM golang:alpine AS builder
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+
+# Git is required for fetching the dependencies.
+RUN apk update && apk add --no-cache git bash libmagic libmagic-static gcc alpine-sdk file-dev && mkdir -p /build/biedatransfer
+
+WORKDIR /build/biedatransfer
+
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+RUN go mod download -json
+
 COPY . .
 
-RUN  go build .
+RUN mkdir -p /app && GOOS=${TARGETPLATFORM%%/*} GOARCH=${TARGETPLATFORM##*/} \
+    go build -ldflags='-s -w' -o /app/biedatransfer .
+
+# RUN echo "Running on architecture: $(uname -m), BUILDPLATFORM=$BUILDPLATFORM, TARGETPLATFORM=$TARGETPLATFORM" && exit 1
+
+FROM alpine:edge
+
+# add testing repository
+RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
+
+RUN apk update && apk add --no-cache libmagic exiftool binwalk ca-certificates 
+
+COPY --from=builder /app/biedatransfer /app/biedatransfer
+
+LABEL org.opencontainers.image.description A docker image for the biedatransfer telegram bot.
 
-CMD ["/go/src/app/biedatransfer"]
+ENTRYPOINT ["/app/biedatransfer"]