Document FORGEJO_TOKEN setup for CI/CD

Add comprehensive documentation for setting up the personal
access token required for the Forgejo Actions CI/CD pipeline
to push Docker images to the container registry.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -9,6 +9,40 @@ Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
 
 Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
 
+## Docker Deployment
+
+See [DOCKER_README.md](DOCKER_README.md) for instructions on running the application with Docker Compose.
+
+## CI/CD Setup
+
+This project uses Forgejo Actions for continuous integration and deployment. The workflow automatically builds and pushes Docker images to the Forgejo container registry on every push to the main branch.
+
+### Setting up the FORGEJO_TOKEN Secret
+
+To enable the CI/CD pipeline to push Docker images to the container registry, you need to create a personal access token and add it as a repository secret:
+
+1. **Create a Personal Access Token**:
+   - Go to your Forgejo instance and log in
+   - Click your profile icon → **Settings**
+   - Click **Applications** in the left sidebar
+   - Scroll to **Generate New Token**
+   - Give it a name (e.g., "GitHub Actions" or "CI/CD")
+   - Check the following permissions:
+     - ✅ **write:package** (required to push to container registry)
+     - ✅ **read:package** (required to pull from container registry)
+   - Click **Generate Token**
+   - Copy the token (you won't be able to see it again!)
+
+2. **Add the Token as a Repository Secret**:
+   - Go to your repository in Forgejo
+   - Click **Settings** → **Secrets**
+   - Click **Add secret**
+   - Set **Name**: `FORGEJO_TOKEN`
+   - Set **Value**: Paste the token you copied
+   - Click **Add secret**
+
+Once configured, the workflow will automatically build and push Docker images on every push to main.
+
 ## Learn more
 
 * Official website: https://www.phoenixframework.org/