update to make sure OPENAI_API_KEY is defined as the gateway implicitly uses it.

Author: Eric Liu

samples/managed-llm-provider/compose.yaml

@@ -9,7 +9,7 @@ services:
     environment:
       - LLM_URL=http://llm/api/v1/
       - LLM_MODEL=default
-      - OPENAI_API_KEY="SAMPLE_KEY"
+      - OPENAI_API_KEY=FAKE_TOKEN
       # For other models, see https://docs.defang.io/docs/concepts/managed-llms/openai-access-gateway#model-mapping
     healthcheck:
       test: ["CMD", "python3", "-c", "import sys, urllib.request; urllib.request.urlopen(sys.argv[1]).read()", "http://localhost:8000/health"]
@@ -34,7 +34,7 @@ services:
         model: ai/smollm2
     x-defang-llm: true
     environment:
-      - OPENAI_API_KEY="SAMPLE_KEY"
+      - OPENAI_API_KEY=FAKE_TOKEN
     deploy:
       resources:
         reservations: