Fix docker command

Author: abetlen

README.md

@@ -102,7 +102,7 @@ Navigate to [http://localhost:8000/docs](http://localhost:8000/docs) to see the
 A Docker image is available on [GHCR](https://ghcr.io/abetlen/llama-cpp-python). To run the server:
 
 ```bash
-docker run --rm -it -p8000:8000 -v /path/to/models:/models -eMODEL=/models/ggml-model-name.bin ghcr.io/abetlen/llama-cpp-python:latest
+docker run --rm -it -p 8000:8000 -v /path/to/models:/models -e MODEL=/models/ggml-model-name.bin ghcr.io/abetlen/llama-cpp-python:latest
 ```
 
 ## Low-level API