Force docker to use root as the user when running the instance

scripts/release/build/Jenkinsfile

@@ -11,9 +11,7 @@ pipeline {
     agent {
         dockerfile {
             filename 'scripts/release/common/docker/setup.Dockerfile'
-            /*
-            args '-v /etc/passwd:/etc/passwd'
-            */
+            args '-u root'
         }
     }
 

scripts/release/common/docker/setup.Dockerfile

@@ -1,5 +1,16 @@
+# Note that we're installing `awscli` from pip rather than from the apt repository because of
+# the following error message:
+#
+# upload failed: pkg/2.0.63803/build_status_dev_2.0.63803.asc.gz to s3://{upload_location}/build_status_dev_2.0.63803.asc.gz seek() takes 2 positional arguments but 3 were given
+#
+# Note that the error only seems to occur when there is a file to upload with zero bytes,
+# but just to be safe we'll still use pip to download and install.
+#
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869194
+# https://github.com/boto/s3transfer/pull/102
+
 FROM ubuntu:18.04
-RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y awscli jq ssh
-#RUN adduser --uid $(grep jenkins /etc/passwd | awk -F: '{ print $3 }') ubuntu
-RUN adduser --uid 111 ubuntu
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get install -y jq git python python-pip ssh && \
+    pip install awscli