chore: add release please (#530)

* chore: add release please

* chore: update CONTRIBUTING.md

* chore: use a specific secret

Author: JGAntunes

.github/workflows/release-please.yml

@@ -0,0 +1,16 @@
+ name: release-please
+ on:
+   push:
+     branches:
+       - master
+ jobs:
+   release-please:
+     runs-on: ubuntu-latest
+     steps:
+       - uses: GoogleCloudPlatform/release-please-action@v2
+         with:
+           # We can't rely on the GITHUB_TOKEN as we need to trigger
+           # further actions and the GITHUB_TOKEN doesn't allow it
+           token: ${{ secrets.NODE_PKG_RELEASE_TOKEN }}
+           release-type: node
+           package-name: "@netlify/build-image"

CONTRIBUTING.md

@@ -5,10 +5,9 @@ please read the [code of conduct](CODE_OF_CONDUCT.md).
 
 ## Releasing
 
-1. `npm version major`, `npm version minor`, `npm version patch` or `npm version prerelease`: generate changelog, bump version, version commit + tag.
-2. `npm run release`: push version commit + tag, push latest CHANGELOG entry to GitHub release page.
-3. Wait for Jenkins build to finish
-4. Create a PR in the [buildbot](https://github.com/netlify/buildbot) to bump [the version](https://github.com/netlify/buildbot/blob/a247edab7ead955cc27bb70ecc9f081e68f1aea6/script/docker-build.sh#L17) of the `build-image`.
+1. Merge the relevant package release PR created by `release-please`
+2. Wait for the Jenkins build to finish
+3. Create a PR in the [buildbot](https://github.com/netlify/buildbot) to bump [the version](https://github.com/netlify/buildbot/blob/a247edab7ead955cc27bb70ecc9f081e68f1aea6/script/docker-build.sh#L17) of the `build-image`.
 
 ## License
 

package.json

@@ -3,9 +3,8 @@
   "version": "3.6.1",
   "description": "This repository contains the tools to make the build image Netlify uses to build a site from git (for continuous deployment.)",
   "main": "index.js",
+  "private": "true",
   "scripts": {
-    "version": "auto-changelog -p -t keepachangelog -l false --starting-commit 9d2e26a && git add CHANGELOG.md",
-    "release": "git push && git push --tags && gh-release"
   },
   "repository": {
     "type": "git",
@@ -18,7 +17,5 @@
   },
   "homepage": "https://github.com/netlify/build-image#readme",
   "devDependencies": {
-    "auto-changelog": "^1.10.2",
-    "gh-release": "^3.4.0"
   }
 }