Fixes #176 -- Install composer before doing main Docker install tasks.
Fixes #176 -- Install composer before doing main Docker install tasks.

AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast