Update Dockerfile

Dockerfile

 FROM netboxcommunity/netbox
 ENV NAPALM_USERNAME netbox-napalm
 
-RUN apk add git && pip3 install --upgrade napalm cffi napalm-dellos10 py3-setuptools
+RUN apk add git && pip3 install --upgrade napalm cffi napalm-dellos10 
+RUN pip install --upgrade pip
+RUN apk add py3-setuptools
 RUN easy_install pillow
 RUN apk add netbox-qrcode && \
     echo "PLUGINS = ['netbox_qrcode']" >> /etc/netbox/config/configuration.py