Increase default var_disk size (#1788)

Author: neyzm

ct/alpine-vaultwarden.sh

@@ -9,7 +9,7 @@ APP="Alpine-Vaultwarden"
 var_tags="alpine;vault"
 var_cpu="1"
 var_ram="256"
-var_disk="0.3"
+var_disk="0.5"
 var_os="alpine"
 var_version="3.20"
 var_unprivileged="1"