Git Notes

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Netlify Deployment from GitHub

Netlify is a cloud platform that automates the build and deployment of web applications directly from your GitHub repository. Every time you push code,...

Netlify is a cloud platform that automates the build and deployment of web applications directly from your GitHub repository. Every time you push code, Netlify automatically builds your site and publishes it to a global CDN. It offers features like deploy previews for pull requests, serverless functions, form handling, and automatic HTTPS — making it one of the most popular deployment platforms for modern web projects.

Why Netlify for GitHub Projects

Netlify excels at deploying frontend applications and static sites with a developer experience that feels almost magical:

Automatic deploys on every push to your configured branch
Deploy previews for every pull request — reviewers can test changes live
Instant rollbacks to any previous deployment with one click
Branch deploys for testing different environments
Edge functions for serverless compute at the CDN level
Free tier that covers most personal and small team projects

Connecting GitHub to Netlify

Go to app.netlify.com and sign up with your GitHub account
Click "Add new site" → "Import an existing project"
Select GitHub as your Git provider
Authorize Netlify to access your repositories
Choose the repository to deploy

Step 2: Configure Build Settings

Netlify auto-detects most frameworks, but you can configure manually:

Branch to deploy	main
Build command	npm run build
Publish directory	dist (or build, out, .next)

For common frameworks:

Framework	Build Command	Publish Directory
React (CRA)	npm run build	build
Vite	npm run build	dist
Next.js (static)	next build && next export	out
Gatsby	gatsby build	public
Hugo	hugo	public
Astro	astro build	dist

Step 3: Deploy

Click "Deploy site." Netlify clones your repo, runs the build command, and publishes the output. Your site is live within minutes at a random URL like amazing-hopper-abc123.netlify.app.

Configuring with netlify.toml

For reproducible configurations, add a netlify.toml file to your repository root:

Example

[build] command = "npm run build" publish = "dist" [build.environment] NODE_VERSION = "20" # Redirect single-page app routes to index.html [[redirects]] from = "/*" to = "/index.html" status = 200 # Custom headers for security [[headers]] for = "/*" [headers.values] X-Frame-Options = "DENY" X-Content-Type-Options = "nosniff" # Branch-specific settings [context.staging] command = "npm run build:staging" [context.deploy-preview] command = "npm run build:preview"

Deploy Previews for Pull Requests

One of Netlify's best features is automatic deploy previews. When someone opens a pull request:

Netlify builds the PR branch
Deploys it to a unique URL (like deploy-preview-42--your-site.netlify.app)
Posts a comment on the PR with the preview URL
Reviewers can test the changes live before approving

This means code reviewers do not need to pull the branch locally and run it — they can simply click the link and see the result.

Environment Variables

Set environment variables in Netlify's dashboard or in netlify.toml:

Example

[build.environment] REACT_APP_API_URL = "https://api.production.com" VITE_ANALYTICS_ID = "UA-XXXXXX"

For sensitive values (API keys, secrets), use the Netlify dashboard under Site settings → Environment variables. These are injected at build time but never committed to your repository.

Continuous Deployment Workflow

The typical workflow with Netlify:

bash example

# Developer works on feature
git checkout -b feature/contact-form
# ... make changes ...
git push origin feature/contact-form

# Netlify builds a deploy preview automatically
# Open PR on GitHub — preview URL appears in PR comments

# After review and merge to main
git checkout main
git merge feature/contact-form
git push origin main

# Netlify automatically deploys to production

Custom Domains

Go to Site settings → Domain management
Add your custom domain
Configure DNS:

Type	CNAME
Name	www
Value	your-site.netlify.app
Type	A
Name	@
Value	75.2.60.5

Netlify provisions and renews SSL certificates automatically.

Rollbacks and Deploy Locks

Instant rollback: Every deployment is immutable. Go to Deploys → click any previous deploy → "Publish deploy." Your site instantly reverts to that version.

Deploy locks: Lock your production site to prevent automatic deployments during sensitive periods:

bash example

# Using Netlify CLI
netlify deploy --lock
# Make manual changes or fixes
netlify deploy --unlock

Serverless Functions

Add backend functionality without a server:

Example

// netlify/functions/hello.js exports.handler = async (event, context) => { return { statusCode: 200, body: JSON.stringify({ message: "Hello from Netlify Functions!" }) }; };

Access at /.netlify/functions/hello. These functions scale automatically and are perfect for API endpoints, form processing, and third-party integrations.

Key Takeaways

Netlify transforms GitHub repositories into live websites with zero server management. Its deploy preview feature revolutionizes code review by letting reviewers see changes live. Combined with serverless functions, custom domains, and automatic HTTPS, Netlify provides a complete deployment platform that scales from personal projects to production applications — all triggered by simply pushing to your GitHub repository.

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for Netlify Deployment from GitHub.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Git & GitHub topic.

Search Terms

git-github, git & github, git, github, deployment, netlify, from, netlify deployment from github

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Git Notes

Netlify Deployment from GitHub

Netlify is a cloud platform that automates the build and deployment of web applications directly from your GitHub repository. Every time you push code,...

Why Netlify for GitHub Projects

Netlify excels at deploying frontend applications and static sites with a developer experience that feels almost magical:

Automatic deploys on every push to your configured branch
Deploy previews for every pull request — reviewers can test changes live
Instant rollbacks to any previous deployment with one click
Branch deploys for testing different environments
Edge functions for serverless compute at the CDN level
Free tier that covers most personal and small team projects

Connecting GitHub to Netlify

Go to app.netlify.com and sign up with your GitHub account
Click "Add new site" → "Import an existing project"
Select GitHub as your Git provider
Authorize Netlify to access your repositories
Choose the repository to deploy

Step 2: Configure Build Settings

Netlify auto-detects most frameworks, but you can configure manually:

Branch to deploy	main
Build command	npm run build
Publish directory	dist (or build, out, .next)

For common frameworks:

Framework	Build Command	Publish Directory
React (CRA)	npm run build	build
Vite	npm run build	dist
Next.js (static)	next build && next export	out
Gatsby	gatsby build	public
Hugo	hugo	public
Astro	astro build	dist

Step 3: Deploy

Click "Deploy site." Netlify clones your repo, runs the build command, and publishes the output. Your site is live within minutes at a random URL like amazing-hopper-abc123.netlify.app.

Configuring with netlify.toml

For reproducible configurations, add a netlify.toml file to your repository root:

Example

Deploy Previews for Pull Requests

One of Netlify's best features is automatic deploy previews. When someone opens a pull request:

Netlify builds the PR branch
Deploys it to a unique URL (like deploy-preview-42--your-site.netlify.app)
Posts a comment on the PR with the preview URL
Reviewers can test the changes live before approving

This means code reviewers do not need to pull the branch locally and run it — they can simply click the link and see the result.

Environment Variables

Set environment variables in Netlify's dashboard or in netlify.toml:

Example

[build.environment] REACT_APP_API_URL = "https://api.production.com" VITE_ANALYTICS_ID = "UA-XXXXXX"

For sensitive values (API keys, secrets), use the Netlify dashboard under Site settings → Environment variables. These are injected at build time but never committed to your repository.

Continuous Deployment Workflow

The typical workflow with Netlify:

bash example

# Developer works on feature
git checkout -b feature/contact-form
# ... make changes ...
git push origin feature/contact-form

# Netlify builds a deploy preview automatically
# Open PR on GitHub — preview URL appears in PR comments

# After review and merge to main
git checkout main
git merge feature/contact-form
git push origin main

# Netlify automatically deploys to production

Custom Domains

Go to Site settings → Domain management
Add your custom domain
Configure DNS:

Type	CNAME
Name	www
Value	your-site.netlify.app
Type	A
Name	@
Value	75.2.60.5

Netlify provisions and renews SSL certificates automatically.

Rollbacks and Deploy Locks

Instant rollback: Every deployment is immutable. Go to Deploys → click any previous deploy → "Publish deploy." Your site instantly reverts to that version.

Deploy locks: Lock your production site to prevent automatic deployments during sensitive periods:

bash example

# Using Netlify CLI
netlify deploy --lock
# Make manual changes or fixes
netlify deploy --unlock

Serverless Functions

Add backend functionality without a server:

Example

// netlify/functions/hello.js exports.handler = async (event, context) => { return { statusCode: 200, body: JSON.stringify({ message: "Hello from Netlify Functions!" }) }; };

Access at /.netlify/functions/hello. These functions scale automatically and are perfect for API endpoints, form processing, and third-party integrations.

Key Takeaways

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for Netlify Deployment from GitHub.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Git & GitHub topic.

Search Terms

git-github, git & github, git, github, deployment, netlify, from, netlify deployment from github

Related Git & GitHub Topics

Continue learning this concept

PreviousGitHub Pages Deployment NextRender Deployment from GitHub

Why Netlify for GitHub Projects

Connecting GitHub to Netlify

Step 1: Sign Up and Connect

Step 2: Configure Build Settings

Step 3: Deploy

Configuring with netlify.toml

Deploy Previews for Pull Requests

Environment Variables

Continuous Deployment Workflow

Custom Domains

Rollbacks and Deploy Locks

Serverless Functions

Key Takeaways

Continue learning this concept

Why Netlify for GitHub Projects

Connecting GitHub to Netlify

Step 1: Sign Up and Connect

Step 2: Configure Build Settings

Step 3: Deploy

Configuring with netlify.toml

Deploy Previews for Pull Requests

Environment Variables

Continuous Deployment Workflow

Custom Domains

Rollbacks and Deploy Locks

Serverless Functions

Key Takeaways

Continue learning this concept