chore(GoReleaser): publish to Docker (#23)

* Create Dockerfile
* Update .goreleaser.yml
* Update .github/workflows/ci.yml

.github/workflows/ci.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+
   pull_request:
 
 permissions:
@@ -12,6 +13,7 @@ permissions:
 jobs:
   ci:
     runs-on: ubuntu-latest
+
     steps:
       - name: Repo clone (go mod tidy / gofmt)
         if: github.event_name != 'pull_request'
@@ -30,14 +32,14 @@ jobs:
           git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --local user.name "github-actions[bot]"
 
-      - name: tidy
+      - name: Tidy
         if: github.event_name != 'pull_request'
         run: |
           go mod tidy -go=1.17
           git add .
           git diff-index --quiet HEAD || git commit -m "go mod tidy"
 
-      - name: gofmt
+      - name: GoFmt
         if: github.event_name != 'pull_request'
         run: |
           go fmt ./...
@@ -66,6 +68,13 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2
         with:

.goreleaser.yml

@@ -31,3 +31,32 @@ checksum:
   name_template: 'md5_checksums.txt'
 
   algorithm: md5
+
+dockers:
+  - id: amd64
+
+    goos: linux
+
+    goarch: amd64
+
+    goarm: ''
+
+    image_templates:
+    - "medzik/pingbot:latest"
+    - "medzik/pingbot:{{ .Tag }}"
+    - "medzik/pingbot:v{{ .Major }}"
+    - "medzik/pingbot:v{{ .Major }}.{{ .Minor }}"
+
+    dockerfile: Dockerfile
+
+    use: docker
+
+    build_flag_templates:
+    - "--pull"
+    - "--label=org.opencontainers.image.created={{ .Date }}"
+    - "--label=org.opencontainers.image.title={{ .ProjectName }}"
+    - "--label=org.opencontainers.image.revision={{ .FullCommit }}"
+    - "--label=org.opencontainers.image.version={{ .Version }}"
+
+    extra_files:
+    - start.sh

Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine
+
+COPY pingbot.out /usr/bin/pingbot
+
+ENTRYPOINT ["/usr/bin/pingbot"]