Added docker:setup yarn script #15745

Job	Run time
Setup	48s
i18n	26s
Admin tests - Chrome	4m 6s
Lint	25s
Unit tests (Node 18.12.1)	25s
Admin-X Settings tests	5m 33s
Comments-UI tests	1m 49s
Unit tests (Node 20.11.1)	23s
Database tests (Node 18.12.1, mysql8)	6m 6s
Database tests (Node 20.11.1, mysql8)	6m 1s
Database tests (Node 20.11.1, sqlite3)	3m 22s
Performance tests	0s
Regression tests (Node 20.11.1, mysql8)	3m 6s
Regression tests (Node 20.11.1, sqlite3)	1m 40s
Ghost-CLI tests	4m 53s
Signup-form tests	1m 14s
Browser tests	14m 5s
Publish @tryghost/admin-x-activitypub	0s
Coverage	10s
All required tests passed or skipped	1s
Canary	0s
	54m 33s

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