chore: remove .env from git tracking and simplify .gitignore rules

- Remove .env file from git tracking (was accidentally committed)
- Simplify .gitignore to use .env* pattern instead of multiple specific patterns
- Update Dockerfile for optimized multi-stage build
- Add gen:api script placeholder to package.json

Security: Ensure sensitive environment variables are not exposed in repository

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

.gitignore

@@ -30,10 +30,7 @@ yarn-error.log*
 
 # env 
 # env local files (keep .env.example)
-.env.local
-.env*.local
-.env.production
-.env.development
+.env*
 !.env.example
 
 # QC