Bump express from 3.4.8 to 4.17.1 in /node-app
Bump express from 3.4.8 to 4.17.1 in /node-app

Bumps [express](https://github.com/expressjs/express) from 3.4.8 to 4.17.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/3.4.8...4.17.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
awslabs/eb-docker-multiple-ports,awslabs/eb-docker-multiple-ports,awslabs/eb-docker-multiple-ports