Add tini to server Docker images #5942

Job	Run time
compute-version	4s
build-docs / build-docs	1m 4s
build-artifacts / code-lint	43s
build-artifacts / frontend-build	9s
build-artifacts / runner-test (ubuntu-latest)	1m 3s
build-artifacts / runner-test (macos-latest)	1m 6s
build-artifacts / gateway-build	16s
build-artifacts / python-build	24s
build-artifacts / generate-json-schema	20s
build-artifacts / python-test (macos-latest, 3.9)	3m 12s
build-artifacts / python-test (macos-latest, 3.10)	3m 10s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 38s
build-artifacts / python-test (macos-latest, 3.12)	3m 25s
build-artifacts / python-test (macos-latest, 3.11)	2m 51s
build-artifacts / python-test (ubuntu-latest, 3.12)	4m 39s
build-artifacts / python-test (macos-latest, 3.13)	2m 23s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 30s
build-artifacts / python-test (ubuntu-latest, 3.10)	4m 47s
build-artifacts / python-test (windows-latest, 3.11)	2m 4s
build-artifacts / python-test (windows-latest, 3.10)	2m 20s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 29s
build-artifacts / python-test (windows-latest, 3.13)	2m 1s
build-artifacts / python-test (windows-latest, 3.12)	2m 14s
build-artifacts / python-test (windows-latest, 3.9)	1m 55s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	38s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	39s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	16s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	14s
	55m 34s

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