Update docker script and dockerfile

Using Ubuntu 23 throws an error "groupadd: GID '1000' already exists" when trying to build. Ubuntu 22 works fine.

There should be no difference between building C3 on Ubuntu 22 vs 23.

To avoid issues raised it's best to move to single Ubuntu version that builds the compiler.

build-with-docker.sh

@@ -2,12 +2,12 @@
 ## build-with-docker.sh
 ## @author gdm85
 ##
-## Script to build c3c for either Ubuntu 22 or 23.
+## Script to build c3c for Ubuntu 22
 ##
 #
 
 if [ $# -ne 1 -a $# -ne 2 ]; then
-	echo "Usage: build-with-docker.sh (22|23) [Debug|Release]" 1>&2
+    echo "Usage: build-with-docker.sh [Debug|Release]" 1
     exit 1
 fi
 
@@ -22,26 +22,18 @@ if type podman 2>/dev/null >/dev/null; then
     IMAGE="localhost/$IMAGE"
 fi
 
-if [ -z "$2" ]; then
+if [ -z "$1" ]; then
     CMAKE_BUILD_TYPE=Debug
 else
-	CMAKE_BUILD_TYPE="$2"
+    CMAKE_BUILD_TYPE="$1"
 fi
 
-TAG="$1"
-if [ "$1" = 22 ]; then
 UBUNTU_VERSION="22.10"
 LLVM_VERSION="15"
-elif [ "$1" = 23 ]; then
-	UBUNTU_VERSION="23.04"
-	LLVM_VERSION="15"
-else
-	echo "ERROR: expected 22 or 23 as Ubuntu version argument" 1>&2
-	exit 2
-fi
-IMAGE="$IMAGE:$TAG"
 
-cd docker && $DOCKER build -t $IMAGE --build-arg UID=$(id -u) --build-arg GID=$(id -g) \
+IMAGE="$IMAGE:22"
+
+cd docker && $DOCKER build -t $IMAGE\
     --build-arg DEPS="llvm-$LLVM_VERSION-dev liblld-$LLVM_VERSION-dev clang-$LLVM_VERSION libllvm$LLVM_VERSION llvm-$LLVM_VERSION-runtime" \
     --build-arg UBUNTU_VERSION="$UBUNTU_VERSION" .
 cd ..

docker/Dockerfile

@@ -11,6 +11,6 @@ RUN export DEBIAN_FRONTEND=noninteractive && export TERM=xterm && apt-get update
 ARG GID=1000
 ARG UID=1000
 
-RUN groupadd --gid=$GID c3c && useradd --gid=$GID --uid=$GID --create-home --shell /bin/bash c3c
+RUN groupadd -o --gid=$GID c3c && useradd --gid=$GID --uid=$GID --create-home --shell /bin/bash c3c
 
 USER c3c