migrate from astro+netlify to tanstack start + self-hosted

Replace the Astro static site with a TanStack Start (Bun runtime) app and
add Dockerfile + compose files so the site can be served from home-main-2
behind the home-reverse-proxy-1 Caddy instead of Netlify. CI workflow
rewritten to build a container image and SSH-deploy to the home host.

tsconfig.json

@@ -1,18 +1,27 @@
 {
-  "extends": "astro/tsconfigs/strictest",
-  "compilerOptions": {
-    "baseUrl": "./src",
-    "strict": true,
-    "paths": {
-      "@/*": ["./*"]
-    },
-    "plugins": [
-      {
-        "name": "@astrojs/ts-plugin"
-      }
-    ],
-    "jsx": "preserve",
-    "jsxImportSource": "solid-js"
-  },
-  "exclude": ["node_modules", "dist"]
+	"include": ["**/*.ts", "**/*.tsx"],
+	"compilerOptions": {
+		"target": "ES2022",
+		"jsx": "react-jsx",
+		"module": "ESNext",
+		"paths": {
+			"@/*": ["./src/*"],
+			"./*": ["./*"]
+		},
+		"lib": ["ES2022", "DOM", "DOM.Iterable"],
+		"types": ["vite/client"],
+
+		"moduleResolution": "bundler",
+		"allowImportingTsExtensions": true,
+		"allowJs": true,
+		"verbatimModuleSyntax": true,
+		"noEmit": true,
+
+		"skipLibCheck": true,
+		"strict": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"noFallthroughCasesInSwitch": true,
+		"noUncheckedSideEffectImports": true
+	}
 }