Merge branch 'jeremiah.foster-master-patch-36676' into 'master'

Update auto/config with SOURCE_DATE_EPOCH env variable

See merge request pureos/infra/make-live!1

auto/config

@@ -23,6 +23,8 @@ IMAGE_TYPE=$(echo $FLAVOR | cut -f2 -d-)
 
 CURRENT_DATE=$(date +%Y%m%d)
 
+export SOURCE_DATE_EPOCH=$(date +%s)
+
 # repository URL
 PUREOS_REPO="https://repo.puri.sm/pureos"