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Add `SINGCVMFS_LOGDIR` #11

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Run time

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Job	Run time
eurolinux/centos-7:latest	15s
eurolinux/centos-7:latest	3m 50s
rockylinux:8	2m 25s
rockylinux:8	3m 39s
rockylinux:9	3m 41s
rockylinux:9	3m 41s
opensuse/leap:15	1m 43s
opensuse/leap:15	1m 43s
	20m 57s