Add CodeSandbox support

.codesandbox/Dockerfile

@@ -0,0 +1,3 @@
+FROM python:3.11
+
+RUN pip install --upgrade pip

.codesandbox/tasks.json

@@ -0,0 +1,22 @@
+{
+  // These tasks will run in order when initializing your CodeSandbox project.
+  "setupTasks": [
+    {
+      "name": "Installing Dependencies",
+      "command": "pip install -r requirements.txt"
+    }
+  ],
+
+  // These tasks can be run from CodeSandbox. Running one will open a log in the app.
+  "tasks": {
+    "python main.py": {
+      "name": "python main.py",
+      "command": "python main.py",
+      "runAtStart": true
+    },
+    "pip install -r requirements.txt": {
+      "name": "Install Dependencies",
+      "command": "pip install -r requirements.txt"
+    }
+  }
+}

README.md

@@ -4,6 +4,12 @@ Get a todo list ChatGPT plugin up and running in under 5 minutes using Python. I
 
 ## Setup
 
+### In CodeSandbox
+
+You can open this repository in CodeSandbox to get started without installing or running anything locally. Open [this sandbox](https://codesandbox.io/p/sandbox/github/openai/plugins-quickstart) and press "Fork" to get started with your own version.
+
+### Locally
+
 To install the required packages for this plugin, run the following command:
 
 ```bash
@@ -22,7 +28,7 @@ Once the local server is running:
 2. In the Model drop down, select "Plugins" (note, if you don't see it there, you don't have access yet).
 3. Select "Plugin store"
 4. Select "Develop your own plugin"
-5. Enter in `localhost:5003` since this is the URL the server is running on locally, then select "Find manifest file".
+5. Enter in http://localhost:5003 since this is the URL the server is running on locally, then select "Find manifest file".
 
 The plugin should now be installed and enabled! You can start with a question like "What is on my todo list" and then try adding something to it as well!