Finalized GitHub Actions guide for Rails

content/guides/ruby/configure-github-actions.md

@@ -27,75 +27,73 @@
 
 ## Overview
 
 GitHub Actions is a CI/CD (Continuous Integration and Continuous Deployment) automation tool built into GitHub. It allows you to define custom workflows for building, testing, and deploying your code when specific events occur (e.g., pushing code, creating a pull request, etc.). A workflow is a YAML-based automation script that defines a sequence of steps to be executed when triggered. Workflows are stored in the `.github/workflows/` directory of a repository.
 
 In this section, you'll learn how to set up and use GitHub Actions to build your Docker image as well as push it to Docker Hub. You will complete the following steps:
 
 1. Define the GitHub Actions workflow.
 2. Run the workflow.
 
-## 1. Set up the workflow
+## 1. Define the GitHub Actions workflow
 
-Set up your GitHub Actions workflow for building, testing, and pushing the image
-to Docker Hub.
+You can create a GitHub Actions workflow by creating a YAML file in the `.github/workflows/` directory of your repository. To do this use your favorite text editor or the GitHub web interface. The following steps show you how to create a workflow file using the GitHub web interface.
+
+If you prefer to use the GitHub web interface, follow these steps:
 
 1. Go to your repository on GitHub and then select the **Actions** tab.
 
 2. Select **set up a workflow yourself**.
 
    This takes you to a page for creating a new GitHub actions workflow file in
-   your repository, under `.github/workflows/main.yml` by default.
+   your repository. By default, the file is created under `.github/workflows/main.yml`, let's change it name to `build.yml`.
 
-3. In the editor window, copy and paste the following YAML configuration.
+If you prefer to use your text editor, create a new file named `build.yml` in the `.github/workflows/` directory of your repository.
 
-   ```yaml
-   name: ci
+Add the following content to the file:
 
-   on:
-     push:
-       branches:
-         - main
+```yaml
+name: Build and push Docker image
 
-   jobs:
-     build:
-       runs-on: ubuntu-latest
-       steps:
-         - name: Login to Docker Hub
-           uses: docker/login-action@v3
-           with:
-             username: ${{ vars.DOCKER_USERNAME }}
-             password: ${{ secrets.DOCKERHUB_TOKEN }}
+on:
+  push:
+    branches:
+      - main
 
-         - name: Set up Docker Buildx
-           uses: docker/setup-buildx-action@v3
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ vars.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-         - name: Build and push
-           uses: docker/build-push-action@v6
-           with:
-             push: true
-             tags: ${{ vars.DOCKER_USERNAME }}/${{ github.event.repository.name }}:latest
-   ```
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
-   For more information about the YAML syntax for `docker/build-push-action`,
-   refer to the [GitHub Action README](https://github.com/docker/build-push-action/blob/master/README.md).
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ${{ vars.DOCKER_USERNAME }}/${{ github.event.repository.name }}:latest
+```
 
-## 2. Run the workflow
+Each GitHub Actions workflow includes one or several jobs. Each job consists of steps. Each step can either run a set of commands or use already [existing actions](https://github.com/marketplace?type=actions). The action above has three steps:
 
-Save the workflow file and run the job.
+1. [**Login to Docker Hub**](https://github.com/docker/login-action): Action logs in to Docker Hub using the Docker ID and Personal Access Token (PAT) you created earlier.
 
-1. Select **Commit changes...** and push the changes to the `main` branch.
+2. [**Set up Docker Buildx**](https://github.com/docker/setup-buildx-action): Action sets up Docker [Buildx](https://github.com/docker/buildx), a CLI plugin that extends the capabilities of the Docker CLI.
 
-   After pushing the commit, the workflow starts automatically.
+3. [**Build and push**](https://github.com/docker/build-push-action): Action builds and pushes the Docker image to Docker Hub. The `tags` parameter specifies the image name and tag. The `latest` tag is used in this example.
 
-2. Go to the **Actions** tab. It displays the workflow.
+## 2. Run the workflow
 
-   Selecting the workflow shows you the breakdown of all the steps.
+Let's commit the changes, push them to the `main` branch. In the workflow above, the trigger is set to `push` events on the `main` branch. This means that the workflow will run every time you push changes to the `main` branch. You can find more information about the workflow triggers [here](https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows).
 
-3. When the workflow is complete, go to your
-   [repositories on Docker Hub](https://hub.docker.com/repositories).
+Go to the **Actions** tab of you GitHub repository. It displays the workflow. Selecting the workflow shows you the breakdown of all the steps.
 
-   If you see the new repository in that list, it means the GitHub Actions
-   successfully pushed the image to Docker Hub.
+When the workflow is complete, go to your [repositories on Docker Hub](https://hub.docker.com/repositories). If you see the new repository in that list, it means the GitHub Actions workflow successfully pushed the image to Docker Hub.
 
 ## Summary