examples: add TLS support to basic price oracle service #3222

Job	Run time
Docker build check	3m 14s
Format check	25s
cross compilation	3m 10s
Compilation check	31s
run itests	7m 43s
run itests postgres	15m 27s
Lint check	2m 1s
migration version check	15s
go mod check	25s
RPC check	1m 13s
run LiT tests	6m 2s
sample configuration check	25s
Sqlc check	28s
test vector check	42s
run unit tests (unit-race)	7m 1s
run unit tests (unit-cover)	1m 38s
run unit tests (unit dbbackend=postgres)	5m 3s
finish	3s
	55m 46s

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