feat: add Docker image, production server and health check

- Multi-stage Dockerfile on node:24-slim, non-root, healthcheck, /app/data volume
- server.mjs wraps the Astro handler with brotli/gzip compression,
  security headers and graceful SIGTERM shutdown (npm start)
- GET /api/health/ reports server and view-counter DB status
- Move build-only packages to devDependencies (smaller runtime image)
- docker-compose.yml as an alternative for Dokploy Compose

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -3,7 +3,7 @@
   "type": "module",
   "version": "0.0.1",
   "engines": {
-    "node": ">=22.22.0"
+    "node": ">=24"
   },
   "scripts": {
     "dev": "astro dev",
@@ -16,29 +16,31 @@
     "astro": "astro",
     "icons": "node scripts/generate-icons.mjs",
     "check:site": "node scripts/check-site.mjs",
-    "fonts": "node scripts/subset-fonts.mjs"
+    "fonts": "node scripts/subset-fonts.mjs",
+    "start": "node server.mjs"
   },
   "dependencies": {
-    "@astrojs/markdown-satteri": "^0.4.4",
-    "@astrojs/mdx": "^8.1.0",
     "@astrojs/node": "^11.1.8",
-    "@astrojs/rss": "^4.0.19",
-    "@astrojs/sitemap": "^3.7.4",
-    "@iconify-json/tabler": "^1.2.42",
-    "@tailwindcss/vite": "^4.3.3",
     "astro": "^7.4.0",
-    "astro-icon": "^1.2.0",
-    "leaflet": "^1.9.4",
-    "tailwindcss": "^4.3.3"
+    "compression": "^1.8.2"
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.10",
+    "@astrojs/markdown-satteri": "^0.4.4",
+    "@astrojs/mdx": "^8.1.0",
+    "@astrojs/rss": "^4.0.19",
+    "@astrojs/sitemap": "^3.7.4",
     "@fontsource-variable/inter": "^5.3.0",
     "@fontsource-variable/rubik": "^5.3.0",
     "@fontsource/inter": "^5.3.0",
     "@fontsource/rubik": "^5.3.0",
+    "@iconify-json/tabler": "^1.2.42",
     "@tailwindcss/typography": "^0.5.20",
+    "@tailwindcss/vite": "^4.3.3",
+    "@types/compression": "^1.8.1",
     "@types/leaflet": "^1.9.22",
+    "astro-icon": "^1.2.0",
+    "leaflet": "^1.9.4",
     "pagefind": "^1.5.2",
     "prettier": "^3.9.10",
     "prettier-plugin-astro": "^1.1.1",
@@ -46,6 +48,7 @@
     "satori": "^0.60.0",
     "sharp": "^0.35.5",
     "subset-font": "^2.9.0",
+    "tailwindcss": "^4.3.3",
     "typescript": "^6.0.3"
   }
 }