feat : Add command line startup instructions (#660)

* feat : Add command line startup instructions

* Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* feat : update readme

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: shootercheng

README.md

@@ -48,6 +48,12 @@ Firstly copy the `.env.example` file to `.env` and set the correct environment v
 cp .env.example .env
 ```
 
+Run the daemon with the following command. It uses `godotenv` to load environment variables from the `.env` file.
+
+```bash
+go run github.com/joho/godotenv/cmd/godotenv@latest -f .env go run cmd/server/main.go
+```
+
 If you were using a non-AWS S3 storage before version 0.1.2, you need to manually set the S3_USE_AWS environment variable to false in the .env file.
 
 Attention that the `PYTHON_INTERPRETER_PATH` is the path to the python interpreter, please specify the correct path according to your python installation and make sure the python version is 3.11 or higher, as dify-plugin-sdk requires.