Remove hardcoded API Token from Dockerfile

Dockerfile

@@ -7,7 +7,8 @@ RUN pip install --no-cache-dir fastapi uvicorn psutil RPi.GPIO
 
 COPY main.py .
 
-ENV LUNA_API_TOKEN="luna-secret-2026"
+# Use environment variables from .env file at runtime instead of hardcoding
+# ENV LUNA_API_TOKEN removed
 
 # We'll need to mount the host's script if we want to run blinking from the container, 
 # but for now let's just expose the stats.