Simplify sample

Author: gabrielfeo

.github/runner/Dockerfile

@@ -3,3 +3,13 @@
 .kotlin
 build
 target
+
+# actions-runner-* downloaded files
+actions-runner-*
+bin
+externals
+config.sh
+env.sh
+run.sh
+safe_sleep.sh
+run-helper.*

.github/runner/entrypoint.sh

@@ -2,57 +2,31 @@
 
 This sample project demonstrates how to customize a GitHub Actions self-hosted runners with preset environment variables.
 
-## Environment Variable Customization
-
-This runner is configured to automatically set the following environment variable before each job runs:
-
-- `FOO=bar`
-
-The customization is implemented using GitHub Actions pre-job hooks:
-
-1. **Script**: `.github/runner/hooks/job-started.sh` - Sets the `FOO=bar` environment variable
-2. **Hook**: `ACTIONS_RUNNER_HOOK_JOB_STARTED` - Triggers the script before each job
-
-([docs](https://docs.github.com/en/actions/how-tos/manage-runners/self-hosted-runners/run-scripts))
-
 ## How it works
 
-When the runner starts, the `ACTIONS_RUNNER_HOOK_JOB_STARTED` is set to `/home/runner/hooks/job-started.sh`. This script is automatically executed by GitHub Actions at the start of each job. The script makes the `FOO=bar` environment variable available to all workflow steps.
-
-The hook script then sets an environment variable for the job using the `$GITHUB_ENV` file, making it available to all job steps.
+TODO
 
-## Building the self-hosted runner image
+## Setting up in an existing runner
 
-This repository includes a Dockerfile under `.github/runner` for building a customized GitHub Actions runner image. The following build args are required:
-
-- VERSION
-- OS
-- ARCH
-- PACKAGE_CHECKSUM (optional, but recommended)
+1. Copy the `runner-hooks/` directory from this repository to the runner
+2. Create a `.env` file next to your `run.sh` with content:
 
 ```sh
-# Build the image with the example defaults used previously in the Dockerfile
-docker build \
-  --build-arg OS=linux \
-  --build-arg ARCH=arm64 \
-  --build-arg VERSION=2.328.0 \
-  --build-arg PACKAGE_CHECKSUM=b801b9809c4d9301932bccadf57ca13533073b2aa9fa9b8e625a8db905b5d8eb \
-  --tag gha-runner:linux-arm64-2.328.0 \
-  .github/self-hosted-runner
+ACTIONS_RUNNER_HOOK_JOB_STARTED=<path-to-runner-hooks>/job-started.sh
 ```
 
-## Obtaining a runner registration token
 
-1. Go to https://github.com/<your-repository>/settings/actions/runners
-2. Click "Add new self-hosted runner"
-3. Choose your target OS and architecture
-4. Copy the token from the `config.sh` step to use when starting the runner
+## Trying with your own machine as a runner
 
-## Starting the runner
+1. Fork this repository
+2. Access the repository Settings > Actions > Runners
+3. Click "Add new self-hosted runner"
+4. Select your OS and CPU architecture
+5. Run the page's steps but create the following `.env` file next to `run.sh`
 
 ```sh
-docker run --rm -it \
-  -e RUNNER_TOKEN=<your-token> \
-  -e RUNNER_URL=<your-repository> \
-  gha-runner:linux-arm64-2.328.0
+ACTIONS_RUNNER_HOOK_JOB_STARTED=<path-to-this-repository>/runner-hooks/job-started.sh
 ```
+
+6. Run `run.sh` to listen for jobs
+7. On GitHub, start the example workflow, which declares `uses: self-hosted`

.gitignore

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-# Pre-job script to set FOO=bar environment variable
-# This script is executed before each job runs on the self-hosted runner
+# This script is executed before each job runs on a self-hosted runner
+# if 'ACTIONS_RUNNER_HOOK_JOB_STARTED=<path-to-this-script>' is set
 
 set -euo pipefail