Update README.md

Author: Kilo59

README.md

@@ -457,7 +457,7 @@ invoke generate-reqs
 
 ### Docker
 
-Our Docker image based on [tiangolo/uvicorn-gunicorn-fastapi/](https://hub.docker.com/r/tiangolo/uvicorn-gunicorn-fastapi/).
+Our Docker image is based on [tiangolo/uvicorn-gunicorn-fastapi/](https://hub.docker.com/r/tiangolo/uvicorn-gunicorn-fastapi/).
 
 ```bash
 invoke docker --build