Update Dockerfile (#7282)

Dockerfile

@@ -19,8 +19,8 @@ RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
 # Copy contents
-RUN git clone https://github.com/ultralytics/yolov5 /usr/src/app
-# COPY . /usr/src/app
+COPY . /usr/src/app
+RUN git clone https://github.com/ultralytics/yolov5 /usr/src/yolov5
 
 # Downloads to user config dir
 ADD https://ultralytics.com/assets/Arial.ttf /root/.config/Ultralytics/