Update Dockerfile

Dockerfile

@@ -6,9 +6,8 @@ RUN apk add alpine-sdk git libressl-dev libffi-dev python3-dev libxml2-dev libxs
 WORKDIR /tmp
 RUN git clone https://github.com/iDebugAll/nextbox-ui-plugin
 WORKDIR /tmp/nextbox-ui-plugin
-RUN source /opt/netbox/venv/bin/activate && \
-    /opt/netbox/venv/bin/pip3 install . && \
-    SECRET_KEY="dummy" /opt/netbox/venv/bin/python /opt/netbox/netbox/manage.py collectstatic --no-input
+RUN source /opt/netbox/venv/bin/activate && /opt/netbox/venv/bin/pip3 install .
+RUN SECRET_KEY="dummy" /opt/netbox/venv/bin/python /opt/netbox/netbox/manage.py collectstatic --no-input
 
 RUN rm -rf /tmp/netbox-qrcode /tmp/nextbox-ui-plugin