docker-compose: persistent volume #918

Job	Run time
Tests	3m 45s
Clippy	2m 46s
Format	33s
Docker (chain, chain)	3m 18s
Validate Swagger	29s
Docker (governance, governance)	2m 9s
Docker (pos, pos)	3m 11s
Docker (rewards, rewards)	2m 6s
Docker (seeder, seeder)	1m 59s
Docker (webserver, webserver)	2m 27s
Docker (parameters, parameters)	2m 54s
Docker (transactions, transactions)	2m 14s
can_enqueue	1s
can_merge	0s
	27m 52s

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