Add cron init to allow user customizable crontabs

root/etc/s6-overlay/s6-rc.d/init-crontabs-config/run

@@ -0,0 +1,22 @@
+#!/usr/bin/with-contenv bash
+# shellcheck shell=bash
+
+# make folders
+mkdir -p \
+    /config/crontabs
+
+## root
+# if crontabs do not exist in config
+if [[ ! -f /config/crontabs/root ]]; then
+    # copy crontab from system
+    if crontab -l -u root; then
+        crontab -l -u root >/config/crontabs/root
+    fi
+
+    # if crontabs still do not exist in config (were not copied from system)
+    # copy crontab from included defaults (using -n, do not overwrite an existing file)
+    cp -n /etc/crontabs/root /config/crontabs/
+fi
+# set permissions and import user crontabs
+lsiown root:root /config/crontabs/root
+crontab -u root /config/crontabs/root