chore: `Dockerfile` remove redundant directives #2137

Job	Run time
Run OIDC conformity tests	5m 17s
Generate SDKs	3m 38s
Run HSM tests	14s
Run end-to-end tests (memory)	1m 34s
Run tests and lints	1m 39s
Run end-to-end tests (memory, --jwt)	1m 35s
Run end-to-end tests (postgres)	1m 36s
Run end-to-end tests (postgres, --jwt)	1m 35s
Run end-to-end tests (mysql)	1m 34s
Run end-to-end tests (mysql, --jwt)	1m 35s
Run end-to-end tests (cockroach)	1m 34s
Run end-to-end tests (cockroach, --jwt)	1m 35s
Build CLI docs	1s
Generate changelog	1s
Generate release	1s
Draft newsletter	1s
Release SDKs	1s
Render version schema	1s
Send newsletter	1s
Pending approval Slack notification	1s
	23m 34s

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