// packages/backend/src/plugins/grpc-playground.ts
import { ScmIntegrations } from '@backstage/integration';
import { createRouter } from 'backstage-grpc-playground-backend';

import { Router } from 'express';
import { PluginEnvironment } from '../types';

export default async function createPlugin(
  env: PluginEnvironment,
): Promise<Router> {
  const { config, reader } = env;

  const integrations = ScmIntegrations.fromConfig(config);

  return await createRouter({
    logger: env.logger,
    reader,
    integrations,
    database: env.database,
  });
}

// packages/backend/src/index.ts
import grpcPlayground from './plugins/grpc-playground';

async function main() {
  // other env
  const grpcPlaygroundEnv = useHotMemoize(module, () => createEnv('grpc-playground'));
  
  // init router
  // ...

  // register before notFoundHandler  
  apiRouter.use('/grpc-playground', await grpcPlayground(grpcPlaygroundEnv));

  // not found handler
  apiRouter.use(notFoundHandler());
}