Newly minted FB11 Dockerfile throws permission errors

[Nick-OpusVL]

This is because we need to write /root/gitstatus.txt and do other stuff as root.

$ make docker 
docker build \
        --build-arg version=`dzil distversion` \
        --build-arg gitrev="`set -x ; git rev-parse HEAD ; git status ; git diff`" \
        -t quay.io/opusvl/kingfisher-website:latest .
+ git rev-parse HEAD
+ git status
+ git diff
Sending build context to Docker daemon  89.09kB
Step 1/13 : FROM quay.io/opusvl/fb11
 ---> 69d484dd98a9
Step 2/13 : MAINTAINER OpusVL <support@opusvl.com>
 ---> Running in 09f950238d75
Removing intermediate container 09f950238d75
 ---> fff87b1f2003
Step 3/13 : ARG version
 ---> Running in 306312d685e4
Removing intermediate container 306312d685e4
 ---> 62c95f666232
Step 4/13 : RUN if [ -z "$version" ]; then echo "No version specified"; exit 1; fi
 ---> Running in b37e6fb7fdee
Removing intermediate container b37e6fb7fdee
 ---> 268e0ea6f8bc
Step 5/13 : ARG gitrev
 ---> Running in b0d075e7ecb9
Removing intermediate container b0d075e7ecb9
 ---> 2430cca8b2f8
Step 6/13 : RUN if [ -z "$gitrev" ]; then echo "No gitrev provided"; exit 1; fi
 ---> Running in 7755479ccc79
Removing intermediate container 7755479ccc79
 ---> a405e17f4575
Step 7/13 : RUN echo "$gitrev" > /root/gitstatus.txt
 ---> Running in fba502fcfacd
/bin/sh: 1: cannot create /root/gitstatus.txt: Permission denied
The command '/bin/sh -c echo "$gitrev" > /root/gitstatus.txt' returned a non-zero code: 2
Makefile:15: recipe for target 'docker' failed
make: *** [docker] Error 2

[Altreus]

These errors are fixed but see also #7