bug: killing first fake node breaks networking for others

[nick1udwig]

Describe the bug
The first fake node to be launched also launches the networking router to make a connection with other fake nodes. When it exits, it brings down the router. Therefore any still-up nodes will be unable to communicate.

To Reproduce
Steps to reproduce the behavior:

1. Launch 3 fake nodes,
2. Kill the first,
3. Try to communicate between the remaining two.

Expected behavior
Communication should still work.

Additional context
We are changing how networking is working, so we'll address this after that change (which will initially have a similar behavior).

h/t @bitful-pannul