Update to 3 in STEP and README.md

.github/steps/-step.txt

@@ -1 +1 @@
-2
+3

README.md

@@ -14,25 +14,21 @@ _Use GitHub Actions to publish your project to a Docker image._
 </header>
 
 <!--
-  <<< Author notes: Step 2 >>>
+  <<< Author notes: Step 3 >>>
   Start this step by acknowledging the previous step.
   Define terms and link to docs.github.com.
 -->
 
-## Step 2: Add a Dockerfile
+## Step 3: Merge your changes
 
-_You created a publishing workflow! :tada:_
+_Let's get publishing! :heart:_
 
-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/).
+You can now [merge](https://docs.github.com/en/get-started/quickstart/github-glossary#merge) your changes!
 
-### :keyboard: Activity: Add a Dockerfile
+### :keyboard: Activity: Merge your changes
 
-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. Merge your changes from `cd` into `main`. If you created the pull request in step 1, just open that PR and click on **Merge pull request**. If you did not create the pull request earlier, you can do it now by following the instructions in step 1.
+1. (optional) Delete the branch `cd`.
 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.
 
 <footer>