Protect nodes against DDoS/DoS attacks

[vovacha]

Based on Parachain launch checklist:

Are you running any RPC nodes, validators or other infrastructure? Are they sufficiently protected from DDoS/DoS attacks?

AWS Shield as a potential solution. Or Cloudflare. Research needed: costs / required features.

[vovacha]

Since we will use a third-party service to run infrastructure, this ticket is not relevant anymore.

Let's discuss which services we will support for prod and then understand if this task is still actual.