add devcontainer config

.devcontainer/devcontainer.json

@@ -0,0 +1,8 @@
+{
+    "name": "Python 3",
+    "image": "mcr.microsoft.com/devcontainers/python",
+    "features": {
+        "ghcr.io/devcontainers-contrib/features/pre-commit:2": {}
+    },
+    "postCreateCommand": "pre-commit install"
+}