Merge pull request #21 from stefanb2/topic-command-as-string

Allow string for command

podman-compose.py

@@ -477,7 +477,9 @@ def container_to_args(cnt, dirname, podman_path, shared_vols):
     args.append(cnt.get('image'))  # command, ..etc.
     command = cnt.get('command')
     if command is not None:
-        # TODO: handle if command is string
+        if is_str(command):
+            args.extend([command])
+        else:
             args.extend(command)
     return args