[FEATURE] Add docker image support

closes #114

Signed-off-by: Jerome Jutteau <mojo@couak.net>
3 jobs for next-release in 7 minutes and 23 seconds (queued for 9 minutes and 30 seconds)
Status Job ID Name Coverage
  Test
passed #31693318
test_app_php56

00:01:43

passed #31693316
test_app_php70

00:03:01

passed #31693315
test_app_php71

00:02:38