feat: generate OpenAPI without peer repositories

scripts/generate-openapi.cjs

@@ -0,0 +1,40 @@
+const { randomBytes } = require('node:crypto');
+const { writeFile } = require('node:fs/promises');
+
+// Schema generation needs no deployment configuration or real credentials.
+Object.assign(process.env, {
+  DATABASE_URL: 'file::memory:',
+  FRONTEND_ORIGIN: 'http://localhost',
+  JWT_SECRET: randomBytes(32).toString('hex'),
+  TOKEN_ENCRYPTION_KEY: randomBytes(32).toString('base64'),
+  PORT: '3000',
+  LOG_LEVEL: 'error',
+  TBANK_GRPC_ENDPOINT: 'localhost:443',
+  TBANK_RATE_LIMIT_PER_SECOND: '5',
+  TBANK_CA_CERT_PATH: '',
+});
+
+const { NestFactory } = require('@nestjs/core');
+const { AppModule } = require('../dist/src/app.module.js');
+const { API_PREFIX, createOpenApiDocument } = require('../dist/src/openapi.js');
+
+async function generate() {
+  const app = await NestFactory.create(AppModule, {
+    preview: true,
+    logger: false,
+  });
+  try {
+    app.setGlobalPrefix(API_PREFIX);
+    await writeFile(
+      'openapi.json',
+      JSON.stringify(createOpenApiDocument(app), null, 2) + '\n',
+    );
+  } finally {
+    await app.close();
+  }
+}
+
+generate().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});