Add site index, deploy script and Green Man mask build

Static site for builds.kestrelsnest.social: an index page with one card per build, an rsync deploy script modelled on pantry, and the Green Man mask guide with its templates and print files.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GrX9qMoNihcWLX3xoJhabw

README.md

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+# Builds
+
+Write-ups of things I've made, each with its templates, print files and a step-by-step guide.
+
+**Live:** https://builds.kestrelsnest.social
+
+A static site with no build step. Each build is a self-contained folder; the top-level `index.html` links to them.
+
+## Files
+
+```
+index.html        - Site index: one card per build
+og-image.jpg      - OpenGraph image for the index (1200 x 630)
+deploy            - Deployment script (rsync to server)
+greenman/         - Green Man mask
+  index.html      - The build and painting guides as one page
+  img/            - Photos and part renders
+  dl/             - Downloads: templates, guide PDFs, print files
+```
+
+## Adding a build
+
+1. Make a folder for it, named in lowercase with no spaces (`greenman`, `atompunk`). Put its page at `<folder>/index.html`, with its images and downloads inside the folder so its links stay relative.
+2. In the top-level `index.html`, copy a `<li class="build">` block to the top of the list and change the link, image, alt text, title, description and tags. The card image is cropped to 4:3, biased toward the top of the photo.
+3. Run `./deploy -n` to check what will be uploaded, then `./deploy`.
+
+## Local preview
+
+```bash
+python3 -m http.server 8000
+```
+
+Then open http://localhost:8000.
+
+## Deployment on YunoHost (My Webapp)
+
+### 1. Install My Webapp
+
+In the YunoHost admin panel:
+1. Go to **Applications** → **Install**
+2. Search for "My Webapp"
+3. Configure:
+   - **Label**: Builds
+   - **Domain/Path**: `builds.kestrelsnest.social`
+   - **PHP version**: none needed
+   - **Database**: none needed
+4. Install
+
+### 2. Point the deploy script at it
+
+Each My Webapp gets a numbered folder on the server. Find this one:
+
+```bash
+ssh social 'ls -d /var/www/my_webapp*'
+```
+
+Set `DIR` in `deploy` to that folder's `www` directory, which for this site is `/var/www/my_webapp__3/www` (already set).
+
+### 3. Deploy
+
+```bash
+./deploy -n    # dry run
+./deploy
+```
+
+The script rsyncs this folder to the server and deletes anything there that is no longer here. It skips the project's own files (`deploy`, `README.md`, `CLAUDE.md`, `.git`).