add chown option to docker file

Dockerfile

@@ -18,13 +18,13 @@ RUN apt-get install ffmpeg libsm6 libxext6 -y
 
 # -----------------------------------
 # Copy required files from repo into image
-COPY ./deepface /app/deepface
+COPY --chown=user ./deepface /app/deepface
 # even though we will use local requirements, this one is required to perform install deepface from source code
-COPY ./requirements.txt /app/requirements.txt
-COPY ./requirements_local /app/requirements_local.txt
-COPY ./package_info.json /app/
-COPY ./setup.py /app/
-COPY ./README.md /app/
+COPY --chown=user ./requirements.txt /app/requirements.txt
+COPY --chown=user ./requirements_local /app/requirements_local.txt
+COPY --chown=user ./package_info.json /app/
+COPY --chown=user ./setup.py /app/
+COPY --chown=user ./README.md /app/
 
 # -----------------------------------
 # if you plan to use a GPU, you should install the 'tensorflow-gpu' package