dockerfile fix

docker/scripts/0-create-cert.sh

@@ -27,10 +27,10 @@ if [ -n "$DOMAIN" ]; then
     -d "$DOMAIN"
 
   # Concatenate certificates
-  . /etc/scripts/2-concatenate-cert.sh
+  . $(dirname $0)/2-concatenate-cert.sh
 
 fi
 
 # Update certificates in HAProxy
-. /etc/scripts/3-update-haproxy-cert.sh
+. $(dirname $0)/3-update-haproxy-cert.sh