Fix: Point to Fast Dash script

Dockerfile

@@ -74,4 +74,4 @@ ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/code/miniconda/lib"
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
 
-CMD exec gunicorn app:server --bind :7860
+CMD exec gunicorn fast_dash_app:server --bind :7860