Update setup and instructions for Qdrant example (#251)

* Update README

* Add warning

Author: willtai

examples/customize/retrievers/external/qdrant/README.md

@@ -11,7 +11,7 @@ docker compose -f tests/e2e/docker-compose.yml up
 Run this from the project root to write data to both Neo4J and Qdrant.
 
 ```bash
-poetry run python -m tests/e2e/qdrant_e2e/populate_dbs.py
+poetry run python -m examples.customize.retrievers.external.qdrant.populate_dbs
 ```
 
 ### Install Qdrant client

examples/customize/retrievers/external/qdrant/docker-compose.yml

@@ -0,0 +1,16 @@
+version: "3.9"
+services:
+  neo4j:
+    image: neo4j:5.24-enterprise
+    ports:
+      - 7687:7687
+      - 7474:7474
+    environment:
+      NEO4J_AUTH: neo4j/password
+      NEO4J_ACCEPT_LICENSE_AGREEMENT: "eval"
+      NEO4J_PLUGINS: "[\"apoc\"]"
+
+  qdrant:
+    image: qdrant/qdrant
+    ports:
+      - 6333:6333