[Improvement] Modify networking + Add collator service

[rnovosad]

Added network_mode: host mode to the services for better interaction. Added collator service into the list.

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[nud3l]

On which OS is that host mode required? At least on Linux and mac the current way should work.

On adding the collator to the vault setup, I'd be inclined to not add that at this point since it will take quite some time to sync up the node and will take a lot more space.

[rnovosad]

I've tried it on CentOS v7 and it didn't want to get up.
Updated docker-compose file tested both on CentOS 7 and on Mac with BigSur no other steps are needed, all worked fine.
If you want me to test more just tell which OS' I should take and I'll verify.

Regarding collator synchronization, I think it will take less time than bitcoin core.
Anyways, you are the boss, so will do what you say :)