docs: update deployment guide

frontend/app/src/pages/docs/quickstart.mdx

@@ -2,14 +2,13 @@
 
 This document provides instructions for deploying the entire RAG using Docker Compose.
 
-## Prerequisites
+## Deploy
 
-1. Set up a [TiDB Serverless cluster](https://docs.pingcap.com/tidbcloud/tidb-cloud-quickstart).
-2. Install [Docker Compose](https://docs.docker.com/compose/install/).
-3. Install [Python 3.11](https://www.python.org/downloads/release/python-3110/).
-4. Install [Rye](https://rye.astral.sh/guide/installation/).
-
-## Deployment Steps
+> **Prerequisites:**
+>
+> 1. Set up a [TiDB Serverless cluster](https://docs.pingcap.com/tidbcloud/tidb-cloud-quickstart).
+> 2. Install [Docker Compose](https://docs.docker.com/compose/install/).
+> 3. Jina AI API key, get one from [Jina AI](https://jina.ai/reranker/).
 
 1. Clone the repository:
 
@@ -18,26 +17,46 @@ This document provides instructions for deploying the entire RAG using Docker Co
     cd tidb.ai
     ```
 
-2. Copy and edit the `.env` file in the `backend` directory:
+2. Copy and edit the `.env` file:
+
+    ```bash
+    cp .env.example .env
+    vim .env # or use another text editor to edit this file
+    ```
+
+    Replace the following placeholders with your own values:
+    - `SECRET_KEY`: you can generate a random secret key using `python3 -c "import secrets; print(secrets.token_urlsafe(32))"`
+    - `JINAAI_API_KEY`: get one from [Jina AI](https://jina.ai/reranker/)
+    - `TIDB_HOST`, `TIDB_USER`, `TIDB_PASSWORD` and `TIDB_DATABASE`: get them from your [TiDB Serverless cluster](https://tidbcloud.com/)
+
+      - Note: TiDB Serverless will provide a default database name called `test`, if you want to use another database name, you need to create a new database in the TiDB Serverless console.
+
+3. Build docker images:
 
     ```bash
-    cp ./backend/.env.example ./backend/.env
-    vim ./backend/.env # or use another text editor to edit this file
+    docker compose build
     ```
 
-3. Migrate the database schema:
+4. Migrate the database schema:
 
     ```bash
-    cd backend
-    rye sync
-    make migrate
-    cd ..
+    docker compose run backend /bin/sh -c "alembic upgrade head"
     ```
 
-4. Start the services using Docker Compose:
+5. Bootstrap the database with initial data:
+
+    ```bash
+    docker compose run backend /bin/sh -c "python bootstrap.py"
+    ```
+
+    Running the bootstrap script creates an admin user. You can find the username and password in the output.
+
+6. Start the services:
 
     ```bash
     docker compose up
     ```
 
+7. Open your browser and visit `http://localhost:3000` to access the web interface.
+
 That's it! You can now use TiDB.AI locally. You can also go to https://tidb.ai to experience the live demo.