refactor(data): add in new config for builder

we are doing phase one of the four phase migration on the builder config

data/model/helpers/build_helper.py

@@ -0,0 +1,44 @@
+import os
+
+
+def _get_config_expand(config):
+  """ Get config with both context and dockerfile_path written to it """
+  if config and "subdir" in config and "context" not in config:
+    config_expand = dict(config)
+    config_expand["context"] = _create_context(config["subdir"])
+    config_expand["dockerfile_path"] = _create_dockerfile_path(config["subdir"])
+    return config_expand
+  return config or {}
+
+
+def _create_context(current_subdir):
+  """ Create context from current subdir """
+  if current_subdir.endswith("Dockerfile"):
+    context, _ = os.path.split(current_subdir)
+    if context == "":
+      return os.path.sep
+
+    return context
+
+  if current_subdir == "":
+    current_subdir = os.path.sep + current_subdir
+
+  if current_subdir[len(current_subdir) - 1] != os.path.sep:
+    current_subdir += os.path.sep
+
+  context, _ = os.path.split(current_subdir)
+  return context
+
+
+def _create_dockerfile_path(current_subdir):
+  """ Create dockefile path from current subdir """
+  if current_subdir.endswith("Dockerfile"):
+    return current_subdir
+
+  if current_subdir == "":
+    current_subdir = os.path.sep + current_subdir
+
+  if current_subdir[len(current_subdir) - 1] != os.path.sep:
+    current_subdir += os.path.sep
+
+  return current_subdir + "Dockerfile"