fix(build): set default railpackVersion to '0.2.2' and ensure cleanup in build process

- Updated the ShowBuildChooseForm component to default railpackVersion to '0.2.2' if not specified.
- Added cleanup step in the buildRailpack function to remove the builder container after execution.
- Refactored application router to include railpackVersion in the application schema.

packages/server/src/utils/builders/railpack.ts

@@ -110,6 +110,8 @@ export const buildRailpack = async (
 		return true;
 	} catch (e) {
 		throw e;
+	} finally {
+		await execAsync("docker buildx rm builder-containerd");
 	}
 };