Backport to 6.6: [Docs] Add topic about running Journalbeat on docker (#9386)#10386

Merged

dedemorton merged 1 commit intoelastic:6.6from dedemorton:backport_9386_6.6

Feb 12, 2019

+24-6

Commits on Jan 29, 2019

[Docs] Add topic about running Journalbeat on docker (elastic#9386 )
dedemorton
committed