Added updating baseimage command before building image

Author: andriyun

.docker/os2forms/build.sh

@@ -7,6 +7,10 @@ if [ $# -eq 0 ]; then
   exit 0
 fi
 
+echo "Updating base image"
+docker image pull drupal:8-apache-buster
+
+echo "Building OS2Forms image with tag $1"
 docker build ./ --build-arg OS2FORMS8_TAG=$1 -t os2forms/os2forms8:$1
 
 if [ "$2" = "--push" ]; then