nas-samba v1.0.1: health check, hostname, remove demo credentials

- Add health check (curl /api/health) so Traefik can verify container health
- Set container hostname to nas.alexzaw.dev
- Remove hardcoded demo credentials from login page
- Remove admin123 fallback password — require SMB_PASSWORD env var
- Fail fast if no admin password is configured

apps/nas-samba/source/app/frontend/build/asset-manifest.json

@@ -1,13 +1,13 @@
 {
   "files": {
-    "main.css": "/static/css/main.da1289f2.css",
-    "main.js": "/static/js/main.fcd0e5c7.js",
+    "main.css": "/static/css/main.f6816838.css",
+    "main.js": "/static/js/main.2e7681ef.js",
     "index.html": "/index.html",
-    "main.da1289f2.css.map": "/static/css/main.da1289f2.css.map",
-    "main.fcd0e5c7.js.map": "/static/js/main.fcd0e5c7.js.map"
+    "main.f6816838.css.map": "/static/css/main.f6816838.css.map",
+    "main.2e7681ef.js.map": "/static/js/main.2e7681ef.js.map"
   },
   "entrypoints": [
-    "static/css/main.da1289f2.css",
-    "static/js/main.fcd0e5c7.js"
+    "static/css/main.f6816838.css",
+    "static/js/main.2e7681ef.js"
   ]
 }