initial test

.github/workflows/matrix-build.yml

@@ -0,0 +1,73 @@
+name: docker
+
+on:
+  push:
+    tags:
+      - "v*"
+
+env:
+  DOCKER_REPO: username/testapp
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    strategy:
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+
+    steps:
+      - name: Set vars
+        id: vars
+        run: |
+          echo "version=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
+          echo "platform=$(echo -n ${{ matrix.platform }} | sed 's/\//-/g')" >> $GITHUB_OUTPUT
+
+      - uses: actions/checkout@v3
+      - uses: docker/setup-qemu-action@v2
+      - uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build docker images
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          platforms: ${{ matrix.platform }}
+          tags: |
+            ${{ env.DOCKER_REPO }}:${{ steps.vars.outputs.version }}-${{ steps.vars.outputs.platform }}
+
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    needs: build
+
+    steps:
+      - name: Set vars
+        id: vars
+        run: |
+          echo "version=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Create Docker Hub manifest
+        run: |
+          docker manifest create $DOCKER_REPO:${{ steps.vars.outputs.version }} \
+            $DOCKER_REPO:${{ steps.vars.outputs.version }}-linux-amd64 \
+            $DOCKER_REPO:${{ steps.vars.outputs.version }}-linux-arm64 
+
+      - name: Push manifests
+        run: |
+          docker manifest push $DOCKER_REPO:${{ steps.vars.outputs.version }}

Dockerfile

@@ -0,0 +1,29 @@
+#
+# MailHog Dockerfile
+#
+
+FROM golang:1.21-alpine as builder
+
+# Install MailHog:
+RUN apk --no-cache add --virtual build-dependencies \
+    git \
+  && mkdir -p /root/gocode \
+  && export GOPATH=/root/gocode \
+  && go install github.com/mailhog/MailHog@latest
+
+FROM alpine:3
+# Add mailhog user/group with uid/gid 1000.
+# This is a workaround for boot2docker issue #581, see
+# https://github.com/boot2docker/boot2docker/issues/581
+RUN adduser -D -u 1000 mailhog
+
+COPY --from=builder /root/gocode/bin/MailHog /usr/local/bin/
+
+USER mailhog
+
+WORKDIR /home/mailhog
+
+ENTRYPOINT ["MailHog"]
+
+# Expose the SMTP and HTTP ports:
+EXPOSE 1025 8025