Remove internal infrastructure references from user documentation

- Removed SAAC API repository link (internal implementation detail)
- Changed DNS target from app.coolify.io to apps.startanaicompany.com
- Updated .env.example to only reference SAAC_API_KEY (not internal tokens)
- Simplified support section to only show template issues

Users should only interact with the SAAC API as a service, not see internal implementation.

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

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

.env.example

@@ -65,9 +65,8 @@ DB_PASSWORD=
 # ===================================
 # API Tokens (for deployment script)
 # ===================================
-# These should be set as environment variables, NOT in this file
-# COOLIFY_API_TOKEN=your-coolify-api-token
-# GITEA_API_TOKEN=your-gitea-api-token
+# Get your SAAC_API_KEY from: https://apps.startanaicompany.com/api/v1/register
+# Set as environment variable: export SAAC_API_KEY="your_key_here"
 
 # ===================================
 # Feature Configuration