[BUG]: .env file may cause issue

[zc277584121]

Is there an existing issue for this?

• [x] I have searched the existing issues

Current Behavior

maybe we need to change .env to .env.example

Expected Behavior

No response

Steps To Reproduce

Software version

Milvus: [e.g. 2.0.0rc1]
Server: [e.g. 2.0.0]
Client: [e.g. 2.0.0]

Anything else?

No response