task: setup basic docker build

.github/workflows/build.yaml → .github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-name: "Build"
+name: "CI"
 
 on:
   push:
@@ -7,9 +7,10 @@ on:
   pull_request:
     branches:
       - "main"
+  workflow_call:
 
 jobs:
-  build:
+  ci:
     runs-on: ubuntu-22.04
 
     steps:

.github/workflows/release.yaml

@@ -0,0 +1,48 @@
+name: "Release"
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  ci:
+    uses: './.github/workflows/ci.yaml'
+
+
+  release:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ghcr.io/jop-software/imap-mailbox-exporter
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - 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 +1,20 @@
+FROM golang:1.18.5-alpine as build
+
+WORKDIR /app
+COPY . /app
+
+RUN go mod download
+RUN go build -o /imap-mailbox-exporter
+
+FROM alpine:3.16.1
+
+WORKDIR /
+
+RUN addgroup -S app && adduser -S -H -G app app
+USER app
+
+COPY --from=build /imap-mailbox-exporter /usr/local/bin/imap-mailbox-exporter
+
+EXPOSE 9101
+
+ENTRYPOINT [ "/usr/local/bin/imap-mailbox-exporter" ]