chore: add instruction for snapshot

[MicBun]

Description

Related Problem

How Has This Been Tested?

[MicBun]

some action are required on the server, please do not merge this instruction to avoid misleading information

[MicBun]

I have working solutions for now:

works:

kwild --root-dir ./my-peer-config/ --chain.statesync.enable=true --chain.statesync.rpc-servers='http://18.189.163.27:26657'

not works:

# even if one of them works, if the other not working then it will fail
kwild --root-dir ./my-peer-config/ --chain.statesync.enable=true --chain.statesync.rpc-servers='http://18.189.163.27:26657,http://3.140.58.76:26657'
Error: failed to start state sync: failed to set up light client state provider: post failed: Post "http://3.140.58.76:26657": context deadline exceeded
failed to start state sync: failed to set up light client state provider: post failed: Post "http://3.140.58.76:26657": context deadline exceeded

# using DNS will resulting in context deadline exceeded
kwild --root-dir ./my-peer-config/ --chain.statesync.enable=true --chain.statesync.rpc-servers='http://staging.node-1.tsn.truflation.com:26657'
panic while building kwild: failed to configure state syncer, failed to fetch trust options from the remote server.:

cc @brennanjl