Add configurable default LLM provider and model preferences

Co-authored-by: mblanke <9078342+mblanke@users.noreply.github.com>

docker-compose.yml

@@ -29,6 +29,8 @@ services:
     environment:
       - LLM_ROUTER_URL=http://strikepackage-llm-router:8000
       - KALI_EXECUTOR_URL=http://strikepackage-kali-executor:8002
+      - DEFAULT_LLM_PROVIDER=${DEFAULT_LLM_PROVIDER:-ollama}
+      - DEFAULT_LLM_MODEL=${DEFAULT_LLM_MODEL:-llama3.2}
     depends_on:
       - llm-router
       - kali-executor