Update docker-compose.yml to include env_file

Author: jring-o

neo4j-docker/docker-compose.yml

@@ -5,6 +5,8 @@ services:
     ports:
       - 7474:7474
       - 7687:7687
+    env_file:
+      - .env
     environment:
       - NEO4J_AUTH=neo4j/${NEO4J_PASSWORD}
       - NEO4J_apoc_export_file_enabled=true