Fix full stack example docker files (#329)

examples/python_fullstack/python_fullstack.yaml

@@ -12,6 +12,12 @@ services:
       type: local
       name: ./workflows
     path: workflows:agentic_w
+    python-dependencies:
+      - llama-index-postprocessor-rankgpt-rerank>=0.2.0
+      - llama-index-vector-stores-qdrant>=0.3.0
+      - llama-index-llms-openai>=0.2.2
+      - llama-index-embeddings-openai>=0.2.4
+      - llama-index-readers-file>=0.2.0
 
   rag_workflow:
     name: RAG Workflow