Add Dockerfile, add ci

.github/release-drafter.yml

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+name-template: 'release-v$NEXT_PATCH_VERSION'
+tag-template: 'release-v$NEXT_PATCH_VERSION'
+categories:
+  - title: 'Features'
+    labels:
+      - 'feature'
+      - 'enhancement'
+  - title: 'Bug Fixes'
+    labels:
+      - 'fix'
+      - 'bugfix'
+      - 'bug'
+  - title: 'Maintenance'
+    labels:
+      - 'chore'
+      - 'documentation'
+change-template: '- $TITLE (#$NUMBER) @$AUTHOR'
+template: |
+  # Changes
+
+  $CHANGES

.github/workflows/release-drafter.yml

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+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  draft_release:
+    if: github.repository == 'PasteUs/golang-alpine'
+    name: Draft release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: toolmantim/release-drafter@v5.2.0
+        name: Draft
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/upload-to-release.yml

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+name: Docker Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+
+  release:
+    if: github.repository == 'PasteUs/golang-alpine'
+    name: Run on ${{ matrix.os }} and push
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v1
+
+      - name: Publish Docker
+        uses: LucienShui/Publish-Docker-Github-Action@2.7.1
+        with:
+          name: registry.cn-hangzhou.aliyuncs.com/pasteus/golang-alpine
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: registry.cn-hangzhou.aliyuncs.com
+          dockerfile: Dockerfile
+          tag_names: true

Dockerfile

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+FROM golang:1.13-alpine
+RUN apk --no-cache add build-base