koa-send, react app with react-router

server.js

import Koa from 'koa';
import logger from 'koa-logger';
import koaSend from 'koa-send';
import App from 'app/shell/server/App';

function staticMiddleware() {
  return async function staticMiddlewareHandler(ctx, next) {
    try {
      if (ctx.path !== '/') {
        return await koaSend(
          ctx,
          ctx.path,
          process.env.NODE_ENV === 'production'
            ? {
                root: 'build',
              }
            : {
                root: PATHS.distDev,
              },
        );
      }
    } catch (e) {
      console.log(e);
    }
    return next();
  };
}

server
  .use(logger())
  .use(staticMiddleware())
  .use(async (ctx, next) => {
    console.log('Run app');
    await App(ctx, next);
    next();
  });