Docker build Image Error

[jerryoman]

Running the make file leads to error 1 and the image cant be build correctly:

...
Step 30/43 : RUN pip install wheel
 ---> Running in ab47a8f2e39d
Traceback (most recent call last):
  File "/bin/pip", line 7, in <module>
    from pip import main
ImportError: cannot import name 'main' from 'pip' (/usr/lib/python3/dist-packages/pip/__init__.py)
The command '/bin/sh -c pip install wheel' returned a non-zero code: 1
Makefile:12: recipe for target 'dev' failed
make: *** [dev] Error 1

[lkraider]

I have updated the Dockerfile and sent as a PR to include in the nsupdate-info project here: nsupdate-info/nsupdate.info#441