Draft: Set a default log dir if GITALY_LOG_DIR not set
For context: !2678 (comment 436121937)
If that env var is not set, we currently try to write to the root dir /, which will cause gitaly to crash-loop with a permission error.
For context: !2678 (comment 436121937)
If that env var is not set, we currently try to write to the root dir /, which will cause gitaly to crash-loop with a permission error.