feat(build runner): added in context, dockerfile_location

this is a new feature meant to allow people to use any file as
  a dockerfile and any folder as a context directory

initdb.py

@@ -605,6 +605,8 @@ def populate_database(minimal=False, with_storage=False):
   trigger.config = json.dumps({
     'build_source': 'jakedt/testconnect',
     'subdir': '',
+    'dockerfile_path': 'Dockerfile',
+    'context': '/',
   })
   trigger.save()