Make it possible to use podman or docker

Author: yarikoptic

utils/gen-docker-image.sh

@@ -7,7 +7,16 @@ VER=$(grep -Po '(?<=^__version__ = ).*' $thisd/../heudiconv/info.py | sed 's/"//
 
 image="kaczmarj/neurodocker:0.9.1"
 
-docker run --rm $image generate docker \
+if hash podman; then
+    OCI_BINARY=podman
+elif hash docker; then
+    OCI_BINARY=docker
+else
+    echo "ERROR: no podman or docker found" >&2
+    exit 1
+fi
+
+${OCI_BINARY:-docker} run --rm $image generate docker \
     --base-image neurodebian:bookworm \
     --pkg-manager apt \
     --dcm2niix \