chore: smaller docker image, simplification pass on environment variables, fix direct navigation without vite

api/lib/static.ts

@@ -14,6 +14,8 @@ export function routeStaticFilesFrom(staticPaths: string[]) {
       }
     }
 
+    // SPA fallback: serve index.html so client-side routes work on direct navigation
+    await send(context, "/index.html", { root: staticPaths[0] });
     await next();
   };
 }