docs: add development and deployment guide to README

.github/workflows/deploy.yml

@@ -1,8 +1,7 @@
 name: Deploy to GitHub Pages
 
 on:
-  push:
-    branches: [main]
+  # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
 permissions:

.github/workflows/release.yml

@@ -0,0 +1,17 @@
+# Automatic release when package.json version changes
+name: Release
+
+on:
+  push:
+    branches: [main]
+    paths: [package.json]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: justincy/github-action-npm-release@2.0.2

README.md

@@ -76,3 +76,24 @@ import Layout from '../../layouts/Layout.astro'
 ### 5. Sitemap
 
 - The sitemap is automatically generated on every build. No manual action is required.
+
+## Releases & Deploys
+
+### Creating a Release
+
+The release workflow automatically detects version changes in `package.json`. When you push to `main` with an updated version, it automatically:
+
+1. Creates a git tag
+2. Generates a changelog from commit history
+3. Creates a GitHub Release
+
+### Deploying
+
+Deployment is manual and triggered from GitHub Actions:
+
+1. Go to **Actions → Deploy to GitHub Pages**
+2. Select the tag you want to deploy (e.g., `v1.0.0`)
+3. Click **Run workflow**
+
+The site is deployed to GitHub Pages at `https://2026.es.pycon.org/`.
+