docs: update readme (#37)

* docs: update readme with `deploy with docker`

* chore: add common questions section

README.md

@@ -35,6 +35,17 @@ SQL Chat is built by Next.js, it supports the following databases and will add m
 
 - Only the database schema will be sent to the OpenAI API. No table data will be sent there.
 
+## Deploy with Docker
+
+```bash
+docker run -d --name sqlchat -p 3000:3000 sqlchat/sqlchat:latest
+```
+
+You can set the following environment variables to customize the deployment:
+
+- `OPENAI_API_KEY`: OpenAI API key. You can get one from [here](https://beta.openai.com/docs/developer-quickstart/api-keys).
+- `OPENAI_API_ENDPOINT`: OpenAI API endpoint. Defaults to `https://api.openai.com`.
+
 ## Local Development
 
 1. Make a copy of the example environment variables file;
@@ -51,6 +62,32 @@ SQL Chat is built by Next.js, it supports the following databases and will add m
    pnpm i && pnpm dev
    ```
 
+## Common questions
+
+<details><summary>How to self host SQL Chat?</summary>
+<p>
+
+- You can deploy SQL Chat to Vercel with one click
+
+  <a href="https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fsqlchat%2Fsqlchat&env=OPENAI_API_KEY"><img src="https://img.shields.io/badge/deploy%20on-Vercel-brightgreen.svg?style=for-the-badge&logo=vercel" alt="vercel"></a>
+
+- You can deploy your SQL Chat with docker in seconds
+
+  ```bash
+  docker run -d --name sqlchat -p 3000:3000 sqlchat/sqlchat:latest
+  ```
+
+</p>
+</details>
+
+<details><summary>It always says that I have a network connection issue?</summary>
+<p>
+
+Please make sure you have a stable network connection which can access the OpenAI API endpoint. If you cannot access the OpenAI API endpoint, you can try to set the `OPENAI_API_ENDPOINT` in UI or environment variable.
+
+</p>
+</details>
+
 ## Star History
 
 [![Star History Chart](https://api.star-history.com/svg?repos=sqlchat/sqlchat&type=Date)](https://star-history.com/#sqlchat/sqlchat&Date)