flatten app to repo root and update docker deployment for single-stack runtime

app/api/me/route.ts

@@ -0,0 +1,10 @@
+export async function GET() {
+  return Response.json({
+    user: {
+      id: 1,
+      email: 'operator@local.fiscal',
+      name: 'Local Operator',
+      image: null
+    }
+  });
+}