Migrating builds to GitHub Actions away from Drone Cloud

.github/CODEOWNERS

@@ -1,4 +1,7 @@
 # These owners will be the default owners for everything in the repo.
 # Unless a later match takes precedence, these owners
 # will be requested for review when someone opens a pull request.
-*       @nytimes/go-developers
+* @nytimes/go-developers
+
+# Make sure any changes to GitHub Actions are approved by project owners.
+.github/workflows/ @nytimes/delivery-engineering

.github/CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing to drone-openapi
 
-drone-openapi is an open source project started by handful of developers at The New York Times and open to the entire open source community.
+`drone-openapi` is an open source project started by handful of developers at The New York Times and open to the entire open source community.
 
 We really appreciate your help!
 
@@ -26,10 +26,8 @@ Before submitting changes, please follow these guidelines:
 1. Open an issue to discuss a new feature.
 1. Write tests.
 1. Make sure code follows the ['Go Code Review Comments'](https://github.com/golang/go/wiki/CodeReviewComments).
-<!--1. Make sure your changes pass `make test`.-->
-<!--1. Make sure the entire test suite passes locally and on Travis CI.-->
 1. Open a Pull Request.
 
 ## License
 
-Unless otherwise noted, the Drone-GAE source files are distributed under the Apache 2.0-style license found in the LICENSE file.
+Unless otherwise noted, `drone-openapi` is distributed under the Apache 2.0-style license found in the LICENSE file.

.github/dependabot.yml

@@ -8,3 +8,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

@@ -0,0 +1,84 @@
+name: Go
+
+on:
+  push:
+    branches: [ "main" ]
+    tags:
+      - '*'
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CGO_ENABLED: 0
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      actions: write
+      checks: write
+      contents: write
+      deployments: write
+      id-token: write
+      issues: write
+      pull-requests: write
+      security-events: write
+      statuses: write
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.19
+
+    - name: Test
+      run: |
+        go mod download
+        go test -cover -vet all
+
+    - name: Build
+      run: |
+        go build -a -ldflags "-X main.version=${GITHUB_REF_NAME} -X main.rev=${GITHUB_SHA}"
+
+    - name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v4
+      with:
+        images: nytimes/drone-openapi
+        tags: |
+          type=raw,value=latest,enable={{is_default_branch}}
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+
+    - name: Login to Docker Hub
+      uses: docker/login-action@v2
+      if: ${{ github.event_name != 'pull_request' }}
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_TOKEN }}
+
+    # dry run, don't push image for pull_request event.
+    - name: Build and push
+      uses: docker/build-push-action@v4
+      with:
+        context: .
+        platforms: linux/amd64
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+
+    - name: Slack notification
+      uses: slackapi/slack-github-action@v1.23.0
+      if: ${{ github.event_name != 'pull_request' }}
+      with:
+        payload: |
+          {
+            "text": "GitHub Actions Build Result: ${{ job.status }}\n triggered_by: ${{ github.actor }}\n job url: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}\n commit url: ${{ github.event.head_commit.url }}"
+          }
+      env:
+        # webhook for #dv-cdp-alerts
+        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

README.md

@@ -1,13 +1,13 @@
 # drone-openapi
 
-[![Build Status](https://cloud.drone.io/api/badges/nytimes/drone-openapi/status.svg)](https://cloud.drone.io/nytimes/drone-openapi)
+[![Build Status](https://github.com/nytimes/drone-openapi/actions/workflows/build.yml/badge.svg)](https://github.com/nytimes/drone-openapi/actions/workflows/build.yaml)
 
 Publish Open API spec files from a Drone pipeline.
 
 ## Links
 
 - Docker Hub [release tags](https://hub.docker.com/r/nytimes/drone-openapi/tags)
-- Drone.io [builds](https://cloud.drone.io/nytimes/drone-openapi)
+- GitHub Actions workflow [runs](https://github.com/nytimes/drone-openapi/actions)
 - Contributing [documentation](.github/CONTRIBUTING.md)
 
 ## Overview