feat: add new custom app (#313)

docs/quickstart.mdx

@@ -9,6 +9,12 @@ Install embedchain python package:
 pip install embedchain
 ```
 
+Creating a chatbot involves 3 steps:
+
+- ⚙️ Import the App instance
+- 🗃️ Add Dataset
+- 💬 Query or Chat on the dataset and get answers (Interface Types)
+
 Run your first bot in python using the following code. Make sure to set the `OPENAI_API_KEY` 🔑 environment variable in the code.
 
 ```python