[Dockerfile] removing a step, moving into the post-upgrade script

Dockerfile

@@ -33,9 +33,6 @@ ADD ./conf/spinbase-licenses /etc/entropy/packages/license.accept
 # Upgrading packages
 RUN equo u && echo -5 | equo conf update
 
-# We ensure to have those packages from the beginning
-RUN equo i sys-boot/grub:2 linux-sabayon sabayon-artwork-core sabayon-version sabayon-artwork-grub sabayon-live
-
 # Perform post-upgrade tasks (mirror sorting, updating repository db)
 ADD ./script/post-upgrade.sh /post-upgrade.sh
 RUN /bin/bash /post-upgrade.sh  && rm -rf /post-upgrade.sh

script/post-upgrade.sh

@@ -80,6 +80,12 @@ PACKAGES_TO_ADD=(
     "app-text/pastebunz"
     "app-admin/perl-cleaner"
     "sys-apps/grep"
+    "app-misc/sabayon-live"
+    "sys-boot/grub:2"
+    "sys-kernel/linux-sabayon"
+    "x11-themes/sabayon-artwork-core"
+    "app-misc/sabayon-version"
+    "x11-themes/sabayon-artwork-grub"
 )
 
 # Handling install/removal of packages specified in env