Update uid an gid in bionic images

Author: jeanp413

bionic-arm32v7/Dockerfile

@@ -2,8 +2,9 @@ FROM arm32v7/ubuntu:bionic
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
+# Github uses uid 1001 and gid 121
+RUN groupadd --gid 121 builduser \
+  && useradd --uid 1001 --gid builduser --shell /bin/bash --create-home builduser
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   software-properties-common \

bionic-arm64/Dockerfile

@@ -4,8 +4,9 @@ FROM ${REPO}:${TAG}
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
+# Github uses uid 1001 and gid 121
+RUN groupadd --gid 121 builduser \
+  && useradd --uid 1001 --gid builduser --shell /bin/bash --create-home builduser
 
 # ubuntu keeps its i386/amd64 and other architecture repos separate
 # the default i386/amd64 packages can be found in http://archive.ubuntu.com while all other architectures are in http://ports.ubuntu.com/

bionic-armhf/Dockerfile

@@ -4,8 +4,9 @@ FROM ${REPO}:${TAG}
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
+# Github uses uid 1001 and gid 121
+RUN groupadd --gid 121 builduser \
+  && useradd --uid 1001 --gid builduser --shell /bin/bash --create-home builduser
 
 # ubuntu keeps its i386/amd64 and other architecture repos separate
 # the default i386/amd64 packages can be found in http://archive.ubuntu.com while all other architectures are in http://ports.ubuntu.com/

bionic-x64/Dockerfile

@@ -4,8 +4,9 @@ FROM ${REPO}:${TAG}
 
 ARG DEBIAN_FRONTEND=noninteractive
 
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser \
+# Github uses uid 1001 and gid 121
+RUN groupadd --gid 121 builduser \
+  && useradd --uid 1001 --gid builduser --shell /bin/bash --create-home builduser \
   && mkdir -p /setup
 
 # Set up TEMP directory