fix: add missing source

Author: josegonzalez

install

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -eo pipefail
 [[ $DOKKU_TRACE ]] && set -x
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
 
 trigger-hostkeys-install() {
   declare desc="installs the hostkeys"