Setup release-please to automate part of our release process (#96)

* chore: remove generated code from repo

* chore: move publish working to `release-please`

* update `RELEASING.md`

* chore: fix `npm run build` command

.github/workflows/release.yml

@@ -0,0 +1,41 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release:
+    if: github.repository == 'tremendous-rewards/tremendous-node'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          release-type: node
+
+      - uses: actions/checkout@v4
+        if: ${{ steps.release.outputs.release_created }}
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          registry-url: 'https://registry.npmjs.org'
+        if: ${{ steps.release.outputs.release_created }}
+
+      - run: npm ci
+        if: ${{ steps.release.outputs.release_created }}
+
+      - run: npm run build
+        if: ${{ steps.release.outputs.release_created }}
+
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        if: ${{ steps.release.outputs.release_created }}

.gitignore

@@ -1,2 +1,3 @@
 /node_modules/
 /npm-debug.log
+./dist

CHANGELOG.md

@@ -0,0 +1 @@
+# Changelog

RELEASING.md

@@ -7,19 +7,19 @@ bin/generate && npm run build
 ```
 
 After that, please review the changes to double check that the changes to the API spec were
-generated correctly. Please open a Pull Request with the file changes and wait for the test pipeline
-before merging it to master.
+generated correctly.
 
-## Step 2 - Update the version on `package.json`
+Please open a Pull Request with the file changes and wait for the test pipeline before merging it
+to main. Make sure to use [Conventional Commit messages]([2]) to help automating the process.
 
-The Pull Request with the changes to the generated files should update the version on `package.json`
-following [Semantic Versioning][2] practices - most changes here should be backwards compatible and
-deserve a MINOR version update
+## Step 2 - Merge the Release Please Pull Request
 
-## Step 3 - Publish a new release on GitHub
+[Release Please](https://github.com/googleapis/release-please) will maintain a "Release PR" that
+consolidates updates to `CHANGELOG.md` (based on the git history) and updating the `package.json`
+file.
 
-The [publish.yml](.github/workflows/publish.yml) workflow is responsible for publishing the package to
-NPM when a new release is published on GitHub.
+When ready to publish a release, merge the Release PR and the [release.yml]
+(.github/workflows/release.yml) workflow will publish a new package to NPM and create a release on GitHub.
 
 [1]: https://openapi-generator.tech
-[2]: https://semver.org
+[2]: https://www.conventionalcommits.org/en/v1.0.0/