chore: Added Few more sections to contributing.md #4774

Job	Run time
checkout	1m 9s
checkout	1m 9s
frontend	40s
frontend	40s
auth	1m 34s
auth	1m 34s
backend	16m 12s
backend	5m 25s
graphql	2m 17s
graphql	2m 17s
local-http-signatures	39s
local-http-signatures	39s
mock-account-servicing-entity	34s
mock-account-servicing-entity	34s
token-introspection	44s
token-introspection	44s
build	0s
build	38s
all_pr_checks_passed	0s
all_pr_checks_passed	3s
	37m 32s

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