[SKV-4350] Add OLLAMA_SUPPORTS_VISION env var, update docs (#4351)

Co-authored-by: Suchintan <suchintan@users.noreply.github.com>

docker-compose.yml

@@ -97,6 +97,7 @@ services:
     # - ENABLE_OLLAMA=true
     # - OLLAMA_MODEL=qwen2.5:7b-instruct
     # - OLLAMA_SERVER_URL=http://host.docker.internal:11434
+    # - OLLAMA_SUPPORTS_VISION=false
     # Open Router Support:
     # - ENABLE_OPENROUTER=true
     # - LLM_KEY=OPENROUTER