test: print container logs on startup failure for easier CI debugging #6309

Job	Run time
backend-verify / Lint Backend	25s
frontend-verify / test-unit	32s
frontend-verify / lint	21s
frontend-verify / type-check	30s
frontend-verify / test-integration (2/2)	1m 43s
backend-verify / Test Backend	4m 31s
frontend-verify / build	57s
frontend-verify / test-integration (1/2)	1m 23s
frontend-verify / e2e-test	5m 41s
dispatch	8s
	16m 11s

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