Add extensions to .devcontainer

.devcontainer/devcontainer.json

@@ -4,19 +4,22 @@
 	"name": "Python 3",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
 	"image": "mcr.microsoft.com/devcontainers/python:1-3.12-bullseye",
-
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
-
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
-
 	// Use 'postCreateCommand' to run commands after the container is created.
-	"postCreateCommand": "pip3 install -e ."
-
-	// Configure tool-specific properties.
-	// "customizations": {},
-
+	"postCreateCommand": "pip3 install -e .",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"ms-python.black-formatter",
+				"ms-python.flake8",
+				"ms-python.vscode-pylance",
+				"ms-python.python"
+			]
+		}
+	}
 	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
 	// "remoteUser": "root"
-}
+}