docs: update README for plain HTML stack

Author: georgeguimaraes

README.md

@@ -1,157 +1,26 @@
 # Plataformatec Farewell Site
 
-A static website announcing the closure of [Plataformatec](https://plataformatec.com) and showcasing what the founders are doing next.
+A static page announcing the closure of [Plataformatec](https://plataformatec.com) and showcasing what the founders are doing next.
 
 ## About
 
-Plataformatec was a software consultancy founded in Brazil, known for creating the [Elixir programming language](https://elixir-lang.org/) and contributing significantly to the Ruby and Elixir ecosystems. In January 2020, the company was acqui-hired by [Nubank](https://nubank.com.br/). This farewell page announces the closure and showcases what the founders are doing next.
+Plataformatec was a software consultancy founded in Brazil, known for creating the [Elixir programming language](https://elixir-lang.org/) and contributing significantly to the Ruby and Elixir ecosystems. In January 2020, the company was acqui-hired by [Nubank](https://nubank.com.br/).
 
 ## Tech Stack
 
-- **Framework:** [Gatsby](https://www.gatsbyjs.com/) 5.x (React-based static site generator)
-- **Language:** TypeScript
-- **Styling:** [Tailwind CSS](https://tailwindcss.com/) 3.x
-- **Deployment:** GitHub Pages (automated via GitHub Actions)
-
-## Prerequisites
-
-- **Node.js** 20.x or higher (project uses Node 23.11.1 via `.tool-versions`)
-- **npm** (comes with Node.js)
-
-If you use [asdf](https://asdf-vm.com/) or [mise](https://mise.jdx.dev/), the correct Node version will be automatically selected.
-
-## Getting Started
-
-### 1. Clone the repository
-
-```bash
-git clone https://github.com/plataformatec/ptec-farewell-page.git
-cd ptec-farewell-page
-```
-
-### 2. Install dependencies
-
-```bash
-npm install
-```
-
-### 3. Start the development server
-
-```bash
-npm run develop
-```
-
-The site will be available at **http://localhost:8000**
-
-GraphQL playground is available at http://localhost:8000/___graphql
-
-## Available Scripts
-
-| Command | Description |
-|---------|-------------|
-| `npm run develop` | Start the development server with hot reload |
-| `npm start` | Alias for `npm run develop` |
-| `npm run build` | Build the site for production |
-| `npm run serve` | Serve the production build locally |
-| `npm run clean` | Clear Gatsby cache and public directory |
-| `npm run typecheck` | Run TypeScript type checking |
+- Plain HTML + [Tailwind CSS](https://tailwindcss.com/) (CDN)
+- Deployed to GitHub Pages via GitHub Actions
 
 ## Project Structure
 
 ```
-├── src/
-│   ├── @types/          # TypeScript type declarations
-│   ├── images/          # Image assets (logos, photos)
-│   ├── pages/           # Page components
-│   │   ├── index.tsx    # Main landing page
-│   │   └── 404.tsx      # 404 error page
-│   └── styles/
-│       └── global.css   # Global styles with Tailwind
-├── static/              # Static assets served as-is
-├── .github/
-│   └── workflows/
-│       └── gatsby.yml   # CI/CD pipeline for GitHub Pages
-├── gatsby-config.ts     # Gatsby configuration
-├── gatsby-browser.js    # Browser-specific Gatsby config
-├── tailwind.config.js   # Tailwind CSS configuration
-├── postcss.config.js    # PostCSS configuration
-└── tsconfig.json        # TypeScript configuration
+├── index.html              # The entire site
+├── images/                 # Logos and photos
+├── .github/workflows/
+│   └── deploy.yml          # Deploy to GitHub Pages on push
+└── .nojekyll               # Skip Jekyll processing
 ```
 
 ## Deployment
 
-### Automatic Deployment (GitHub Pages)
-
-The site is automatically deployed to GitHub Pages when changes are pushed to the `main` branch.
-
-The deployment workflow (`.github/workflows/gatsby.yml`):
-1. Checks out the code
-2. Sets up Node.js 20
-3. Installs dependencies
-4. Builds the site with Gatsby
-5. Deploys to GitHub Pages
-
-### Manual Deployment
-
-To build the site manually for deployment elsewhere:
-
-```bash
-# Build the production site
-npm run build
-
-# The static files will be in the `public/` directory
-```
-
-You can then deploy the contents of the `public/` directory to any static hosting service like:
-- Netlify
-- Vercel
-- AWS S3 + CloudFront
-- Any web server capable of serving static files
-
-### Preview Production Build Locally
-
-```bash
-npm run build
-npm run serve
-```
-
-The production build will be available at **http://localhost:9000**
-
-## Configuration
-
-### Site Metadata
-
-Site metadata is configured in `gatsby-config.ts`:
-
-```typescript
-siteMetadata: {
-  title: `Plataformatec Farewell Site`,
-  siteUrl: `https://plataformatec.com`,
-}
-```
-
-### Google Analytics
-
-Google Analytics is configured via `gatsby-plugin-google-gtag` in `gatsby-config.ts`. The tracking ID is `UA-8268430-16`.
-
-### Tailwind CSS
-
-Custom configuration is in `tailwind.config.js`, including the Plataformatec brand color:
-
-```javascript
-colors: {
-  'ptec-blue': '#16485B'
-}
-```
-
-## Contributing
-
-1. Create a feature branch from `main`
-2. Make your changes
-3. Run `npm run typecheck` to ensure no TypeScript errors
-4. Test locally with `npm run develop`
-5. Submit a pull request
-
-## License
-
-This project is proprietary to Plataformatec.
+Pushes to `main` automatically deploy to GitHub Pages. No build step needed.