## Step 2: Add a Dockerfile _You created a publishing workflow! :tada:_ We will add a `Dockerfile` to the `cd` branch. The `Dockerfile` contains a set of instructions that get stored in a `Docker Image`. If you'd like, you can [learn more about Dockerfiles](https://docs.docker.com/engine/reference/builder/). ### :keyboard: Activity: Add a Dockerfile 1. In the `cd` branch, create `Dockerfile` at the project root and include: ```dockerfile FROM nginx:1.24-alpine COPY . /usr/share/nginx/html ``` 1. Commit your changes. 1. Wait about 20 seconds then refresh this page (the one you're following instructions from). [GitHub Actions](https://docs.github.com/en/actions) will automatically update to the next step.