add vscode settings for the black formatter

Author: shadycuz

.devcontainer/devcontainer.json

@@ -23,7 +23,8 @@
 		"ms-azuretools.vscode-docker",
 		"eamodio.gitlens",
 		"ms-python.python",
-		"njpwerner.autodocstring"
+		"njpwerner.autodocstring",
+		"ms-python.black-formatter"
 	],
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],

.vscode/settings.json

@@ -6,6 +6,7 @@
     "python.testing.unittestEnabled": false,
     "python.testing.pytestEnabled": true,
     "[python]": {
-        "editor.defaultFormatter": "ms-python.black-formatter"
+        "editor.defaultFormatter": "ms-python.black-formatter",
+        "editor.formatOnSave": true
     }
 }