Restructuring build flows to choose user as default but be overridable

ai-tools/Docker/build.sh

@@ -12,6 +12,9 @@ function main() {
     cd "${SCRIPTPATH}/.."
     echo "Working Dir: " $(pwd)
 
-    podman build -t "${CONTAINER}" -f Docker/Dockerfile .
+    podman build \
+        --build-arg USERNAME="${USER}" \
+        -t "${CONTAINER}" \
+        -f Docker/Dockerfile .
 }
 main $@;