Merge pull request #336 from OWASP/snyk-fix-6f4829e0baf659fb764c76001b93dbc4

[Snyk] Security upgrade ubuntu from latest to 20.04

Author: Ali Razmjoo

modules/ftp/strong_password/Dockerfile

@@ -1,5 +1,5 @@
 # using phusion/baseimage as base image
-FROM ubuntu:latest
+FROM ubuntu:20.04
 
 # use baseimage-docker's init system.
 CMD ["/sbin/my_init"]