docs(readme): add todo and examples sections

README.md

@@ -1,4 +1,6 @@
-# release-please-action
+<h1 align="center">
+  release-please-action
+</h1>
 
 Composite [GitHub Action][1] which wraps [release-please-action][2] and
 [github-app-token][3] actions, with some opinionated default settings.
@@ -9,8 +11,62 @@ Composite [GitHub Action][1] which wraps [release-please-action][2] and
 
 ## Features
 
-- Makes it easy to run release-please as a GitHub App.
-- Defaults to placing release place config and manifests within the `.github`
+- Makes it easy to run release-please as a GitHub App, allowing checks to run on
+  Release Pull Requests.
+- Defaults to placing release-please config and manifest within the `.github`
   folder in the repository root:
-  - `.release-please-manifest.json` -> `.github/release-please-manifest.json`
-  - `release-please-config.json` -> `.github/release-please-config.json`
+  - `.github/release-please-manifest.json` instead of
+    `.release-please-manifest.json`.
+  - `.github/release-please-config.json` instead of
+    `release-please-config.json`.
+
+## To-Do
+
+- [ ] Verify stability of this action.
+- [ ] Setup CI releases using itself, so the action can be referred to with
+      `@v1` instead of `@main`.
+
+## Examples
+
+The below example assumes you have secrets already setup for the app ID and
+private key.
+
+If you do not want to authenticate as a GitHub App, simply do not provide
+`app-id` and `private-key` inputs.
+
+```yaml
+on: push
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
+    steps:
+      - uses: jimeh/release-please-action@main
+        with:
+          app-id: ${{ secrets.RELEASE_BOT_APP_ID }}
+          private-key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
+          command: manifest
+```
+
+The above, is equivalent to:
+
+```yaml
+on: push
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
+    steps:
+      - uses: tibdex/github-app-token@v1
+        id: github-app-token
+        with:
+          app_id: ${{ secrets.RELEASE_BOT_APP_ID }}
+          private_key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
+      - uses: google-github-actions/release-please-action@v3
+        id: release-please
+        with:
+          token: ${{ steps.github-app-token.outputs.token }}
+          command: manifest
+          config-file: .github/release-please-config.json
+          manifest-file: .github/release-please-manifest.json
+```