docs: use APP_ prefix instead of reserved GITHUB_ prefix (#363)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

README.md

@@ -9,10 +9,10 @@ GitHub Action for creating a GitHub App installation access token.
 In order to use this action, you need to:
 
 1. [Register new GitHub App](https://docs.github.com/apps/creating-github-apps/setting-up-a-github-app/creating-a-github-app).
-2. [Store the App's Client ID in your repository environment variables](https://docs.github.com/actions/how-tos/write-workflows/choose-what-workflows-do/use-variables#defining-configuration-variables-for-multiple-workflows) (example: `GITHUB_APP_CLIENT_ID`).
+2. [Store the App's Client ID in your repository variables](https://docs.github.com/actions/how-tos/write-workflows/choose-what-workflows-do/use-variables#defining-configuration-variables-for-multiple-workflows) (example: `APP_CLIENT_ID`).
-3. [Store the App's private key in your repository secrets](https://docs.github.com/actions/how-tos/write-workflows/choose-what-workflows-do/use-secrets?tool=webui#creating-secrets-for-a-repository) (example: `GITHUB_APP_PRIVATE_KEY`).
+3. [Store the App's private key in your repository secrets](https://docs.github.com/actions/how-tos/write-workflows/choose-what-workflows-do/use-secrets?tool=webui#creating-secrets-for-a-repository) (example: `APP_PRIVATE_KEY`).
 
-> [!IMPORTANT]  
+> [!IMPORTANT]
 > An installation access token expires after 1 hour. Please [see this comment](https://github.com/actions/create-github-app-token/issues/121#issuecomment-2043214796) for alternative approaches if you have long-running processes.
 
 ### Create a token for the current repository
@@ -31,8 +31,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
       - uses: ./actions/staging-tests
         with:
           token: ${{ steps.app-token.outputs.token }}
@@ -51,8 +51,8 @@ jobs:
         id: app-token
         with:
           # required
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
       - uses: actions/checkout@v6
         with:
           token: ${{ steps.app-token.outputs.token }}
@@ -77,8 +77,8 @@ jobs:
         id: app-token
         with:
           # required
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
       - name: Get GitHub App User ID
         id: get-user-id
         run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
@@ -102,8 +102,8 @@ jobs:
         id: app-token
         with:
           # required
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
       - name: Get GitHub App User ID
         id: get-user-id
         run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
@@ -138,8 +138,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
       - uses: peter-evans/create-or-update-comment@v4
         with:
@@ -160,8 +160,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
           repositories: |
             repo1
@@ -185,8 +185,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: another-owner
       - uses: peter-evans/create-or-update-comment@v4
         with:
@@ -210,8 +210,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
           permission-issues: write
       - uses: peter-evans/create-or-update-comment@v4
@@ -252,8 +252,8 @@ jobs:
       - uses: actions/create-github-app-token@v3
         id: app-token
         with:
-          client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+          client-id: ${{ vars.APP_CLIENT_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
           owner: ${{ matrix.owners-and-repos.owner }}
           repositories: ${{ join(matrix.owners-and-repos.repos) }}
       - uses: octokit/request-action@v2.x
@@ -310,8 +310,8 @@ If you set `HTTP_PROXY` or `HTTPS_PROXY`, also set `NODE_USE_ENV_PROXY: "1"` on
     NO_PROXY: github.example.com
     NODE_USE_ENV_PROXY: "1"
   with:
-    client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+    client-id: ${{ vars.APP_CLIENT_ID }}
-    private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+    private-key: ${{ secrets.APP_PRIVATE_KEY }}
 ```
 
 ## Inputs
@@ -334,14 +334,14 @@ steps:
   - name: Decode the GitHub App Private Key
     id: decode
     run: |
-      private_key=$(echo "${{ secrets.GITHUB_APP_PRIVATE_KEY }}" | base64 -d | awk 'BEGIN {ORS="\\n"} {print}' | head -c -2) &> /dev/null
+      private_key=$(echo "${{ secrets.APP_PRIVATE_KEY }}" | base64 -d | awk 'BEGIN {ORS="\\n"} {print}' | head -c -2) &> /dev/null
       echo "::add-mask::$private_key"
       echo "private-key=$private_key" >> "$GITHUB_OUTPUT"
   - name: Generate GitHub App Token
     id: app-token
     uses: actions/create-github-app-token@v3
     with:
-      client-id: ${{ vars.GITHUB_APP_CLIENT_ID }}
+      client-id: ${{ vars.APP_CLIENT_ID }}
       private-key: ${{ steps.decode.outputs.private-key }}
 ```