Put S03 on a virtual network

[DominicOram]

We had an issue where local s03s were using ports that clashed with real IOCs on the rest of the network. The immediate issue has been fixed in https://gitlab.diamond.ac.uk/controls/python3/s03_utils/-/merge_requests/11 but using arbitrary ports across the whole DLS network is inconsiderate. Instead the proposal is to:

• Put s03 on a virtual network on each dev machine
• Use the gateway on s03 to only allow traffic from a whitelisted group of IPs

Note

There is a requirement to have both an S03 for each developer (that can be accessed by others but isn't by default) and a move generic S03 that can more easily be accessed by multiple developers.

[DominicOram]

FYI, @gilesknap, @coretl, @callumforrester