Kleine wijzigingen, Docker best practises

Dockerfile

@@ -1,6 +1,6 @@
 FROM debian:latest
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt update && apt -y install perl cpanminus libaspell-dev make libdbd-mysql-perl libdigest-perl-md5-perl libxml-simple-perl \
    libmodule-install-perl gcc libperl-dev default-libmysqlclient-dev libpng-dev build-essential libgd-dev mariadb-client imagemagick \

distribution/docker-compose.yml

@@ -3,7 +3,7 @@
 #  however, you can use it as a guide to create a proper production environment.
 services:
    db:
-     image: mariadb
+     image: docker.io/library/mariadb:latest
      container_name: db
      environment:
      - MYSQL_ROOT_PASSWORD=123qwe