* move dockerode into a separate class
* rename `nwaku` to `WakuNode` to generalise
- nwaku and go-waku were running through
`nwaku.ts`
* move wakunode and docker into one subdir
* rename node to `NimGoNode` and update imports in tests
* update docker to host all containers in a specific network
* update the peer exchange test
* assign static IPs to containers
* enable relay on px interop
* fix px compliance tests
* fix import
