use nano instead of vi and cleanup more apt caches

[AEnterprise]

More space optimalizations for the docker image, this one does a few related things

• switch vim for nano. vim is a very heavy editor (40Mb) and overkill and complicated to use for people who have never used it, in addition most of the time you shouldn't even be editing configs from within the docker but mounting it from outside
• combine the editor install with the other installs, due to the editor being installed without cleaning that layer was very bloated with apt caches
• expand apt cache clearing, apt clean only deletes the packages downloaded, but not the sizable repository index stored in the lists directory

[phanan]

Thanks!