Update README: Remove non-existent features from documentation

- Remove saac shell commands (not available)
- Remove saac domain commands (not available)
- Remove resource limit update commands (not available)
- Simplify debugging section with available commands
- Keep only working features: logs, env, status

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -470,57 +470,25 @@ saac logs --follow
 
 ### How to Debug
 
-**Open remote shell:**
+**Check deployment logs:**
 ```bash
-saac shell
+saac logs --follow
 ```
 
-**Inside the container:**
+**View environment variables:**
 ```bash
-# Check if app is running
-ps aux | grep node
+saac env list
+```
 
-# View environment variables
-printenv
-
-# Check database connection
-nc -zv postgres 5432
-
-# Check Redis connection
-nc -zv redis 6379
-
-# View application logs
-tail -f /var/log/app.log
+**Check application status:**
+```bash
+saac status
 ```
 
 ---
 
 ## Advanced Configuration
 
-### Custom Domain
-
-To use a custom domain instead of `*.startanaicompany.com`:
-
-```bash
-saac domain add yourdomain.com
-
-# Update Traefik labels in docker-compose.yml
-# Then redeploy
-saac deploy
-```
-
-### Resource Limits
-
-Set CPU and memory limits:
-
-```bash
-saac update \
-  --cpu-limit 2 \
-  --memory-limit 2G
-
-saac deploy
-```
-
 ### Pre-deployment Scripts
 
 Run database migrations before deployment: