Add devcontainer configuration

.devcontainer/devcontainer.json

@@ -0,0 +1,18 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/python
+{
+	"name": "Python 3",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/python:1-3.10",
+	"features": {
+		"ghcr.io/devcontainers/features/desktop-lite:1": {
+			"version": "latest",
+			"noVncVersion": "1.2.0",
+			"password": "vscode",
+			"webPort": "6080",
+			"vncPort": "5901"
+		}
+	},
+	"forwardPorts": [6080],
+	"postCreateCommand": "pip3 install -r requirements.txt && sudo apt-get update && sudo apt-get -y install python3-opencv python3-tk"
+}

readme.md

@@ -63,6 +63,17 @@ requires Python and Pip to be installed on your machine.
 > **Note**: On Linux machines, you may see an error message that `opencv` or `tkinter` are not found.
 > If you see this, install those dependencies by running `sudo apt-get install python3-opencv python3-tk` and then try again.
 
+### Codespaces
+
+For development, a pre-made environment is available in [Codespaces](https://github.com/features/codespaces):
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/iansan5653/open-mcr?quickstart=1)
+
+> [!NOTE]
+> The configuration auomatically installs the [`desktop-lite`](https://github.com/devcontainers/features/tree/main/src/desktop-lite)
+> feature for running the GUI. This environment can be accessed in your browser through the forwarded `6080` port. The
+> desktop password is `vscode`.
+
 ## Printable Multiple Choice Sheet
 
 The multiple choice sheet that must be used with this software is available