add: stand configs

PROD_STAND/POSTGRES/testnode/src/openapi-spec.ts

@@ -0,0 +1,23 @@
+import {ApplicationConfig} from '@loopback/core';
+import {Loopback4ExampleGithubApplication} from './application';
+
+/**
+ * Export the OpenAPI spec from the application
+ */
+async function exportOpenApiSpec(): Promise<void> {
+  const config: ApplicationConfig = {
+    rest: {
+      port: +(process.env.PORT ?? 3000),
+      host: process.env.HOST ?? 'localhost',
+    },
+  };
+  const outFile = process.argv[2] ?? '';
+  const app = new Loopback4ExampleGithubApplication(config);
+  await app.boot();
+  await app.exportOpenApiSpec(outFile);
+}
+
+exportOpenApiSpec().catch(err => {
+  console.error('Fail to export OpenAPI spec from the application.', err);
+  process.exit(1);
+});