Add docker installation (#112)

Author: micnncim

.github/workflows/docker.yml

@@ -0,0 +1,61 @@
+name: Docker
+
+on:
+  push:
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+          buildkitd-flags: --debug
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx/cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GHCR_TOKEN }}
+
+      - name: Output version
+        id: version
+        run: |
+          echo ::set-output name=version::${GITHUB_REF##*/}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          cache-from: type=local,src=/tmp/.buildx/cache
+          cache-to: type=local,dest=/tmp/.buildx/cache,mode=max
+          tags: |
+            ${{ github.repository }}:latest
+            ${{ github.repository }}:${{ steps.version.outputs.version }}
+            ghcr.io/${{ github.repository }}:latest
+            ghcr.io/${{ github.repository }}:${{ steps.version.outputs.version }}

Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.15-alpine AS builder
+
+WORKDIR /app
+COPY . /app
+
+RUN go build -o /bin/kubectl-reap ./cmd/kubectl-reap
+
+FROM gcr.io/distroless/base-debian10
+
+COPY --from=builder /bin/kubectl-reap /usr/bin
+CMD ["kubectl-reap"]

README.md

@@ -2,6 +2,7 @@
 
 [![actions-workflow-test][actions-workflow-test-badge]][actions-workflow-test]
 [![release][release-badge]][release]
+[![docker][docker-badge]][docker]
 [![codecov][codecov-badge]][codecov]
 [![pkg.go.dev][pkg.go.dev-badge]][pkg.go.dev]
 [![license][license-badge]][license]
@@ -50,6 +51,20 @@ $ brew install kubectl-reap
 $ go get github.com/micnncim/kubectl-reap/cmd/kubectl-reap
 ```
 
+### Via Docker
+
+In Docker Hub:
+
+```
+$ docker run --rm -it micnncim/kubectl-reap kubectl-reap
+```
+
+In GitHub Container Registry:
+
+```
+$ docker run --rm -it ghcr.io/micnncim/kubectl-reap kubectl-reap
+```
+
 ## Examples
 
 ### Pods
@@ -212,6 +227,9 @@ This plugin provides more flexible, easy way to delete resources.
 [release]: https://github.com/micnncim/kubectl-reap/releases
 [release-badge]: https://img.shields.io/github/v/release/micnncim/kubectl-reap?style=for-the-badge&logo=github
 
+[docker]: https://hub.docker.com/repository/docker/micnncim/kubectl-reap
+[docker-badge]: https://img.shields.io/docker/v/micnncim/kubectl-reap?sort=semver&style=for-the-badge&logo=docker
+
 [codecov]: https://codecov.io/gh/micnncim/kubectl-reap
 [codecov-badge]: https://img.shields.io/codecov/c/github/micnncim/kubectl-reap?style=for-the-badge&logo=codecov