set tab config

Former-commit-id: 1c3fc9a872

.devcontainer/devcontainer.json

@@ -17,7 +17,9 @@
 		"python.linting.pycodestylePath": "/usr/local/py-utils/bin/pycodestyle",
 		"python.linting.pydocstylePath": "/usr/local/py-utils/bin/pydocstyle",
 		"python.linting.pylintPath": "/usr/local/py-utils/bin/pylint",
-		"python.testing.pytestPath": "/usr/local/py-utils/bin/pytest"
+		"python.testing.pytestPath": "/usr/local/py-utils/bin/pytest",
+    "editor.tabSize": 2,
+    "editor.insertSpaces": false
 	},
 	"extensions": [
 		"mhutchie.git-graph",