1. Introduction

Welcome to this tutorial on creating a CI/CD pipeline. Our main objective is to automate the testing and deployment of your HTML code to make maintaining and updating your web applications easier.

By the end of this tutorial, you'll learn:

• The basics of CI/CD pipelines
• How to create and configure a CI/CD pipeline
• How to automate testing and deployment

Prerequisites:
- Basic understanding of HTML and web development
- Familiarity with Git and GitHub

2. Step-by-Step Guide

A CI/CD pipeline (Continuous Integration/Continuous Deployment) is a practice in software development where developers regularly merge their code changes into a central repository, whereupon automated builds and tests are run.

Setting up a CI/CD pipeline

1. Set up a Repository: Create a repository on GitHub. This is where your HTML code will live.

2. Push Code to the Repository: Add your HTML code to this repository.

3. Create a Pipeline: Use GitHub Actions to create a new workflow. This will be your pipeline.

4. Configure the Pipeline: Define the steps that the pipeline should take. This could include testing and deployment steps.

5. Test the Pipeline: Make a small change to your HTML file and push it to your repo. This should trigger your pipeline.

3. Code Examples

Example 1: Setting up a Repository

# Create a new repository on GitHub
# Name it 'my-ci-cd-pipeline'

Example 2: Push Code to the Repository

# Clone the repository to your local machine
git clone https://github.com/username/my-ci-cd-pipeline.git

# Add your HTML code to the repository
echo "<h1>Hello, World!</h1>" > index.html

# Commit and push your changes
git add .
git commit -m "Initial commit"
git push origin master

Example 3: Create and Configure a Pipeline

# This is a basic workflow to help you get started with Actions

name: CI

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
    - uses: actions/checkout@v2

    # Runs a single command using the runners shell
    - name: Run a one-line script
      run: echo Hello, world!

4. Summary

In this tutorial, we've covered how to create a CI/CD pipeline, including setting up a repository, pushing code to the repository, and creating and configuring a pipeline.

For further learning, consider exploring more complex pipeline configurations, including running tests, deploying to different environments, and using different types of runners.

Additional resources:
- GitHub Actions Documentation
- Getting Started with CI/CD

5. Practice Exercises

1. Exercise 1: Create a new repository and push a simple HTML file to it. Set up a basic CI pipeline that runs when you push to the main branch.

2. Exercise 2: Add a step to your pipeline that checks your HTML for errors using a tool like HTMLProofer.

3. Exercise 3: Set up a CD pipeline that deploys your HTML to a web server whenever you push to the main branch. You can use a service like Netlify for easy deployment.

Solutions to these exercises are beyond the scope of this tutorial, but you can find many resources online to help you. Good luck!