diff --git a/README.md b/README.md
index c969cc4..d929cad 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,13 @@ docker run -p 3000:3000 opendronemap/nodeodm
 docker-machine ip
 ```
 
+* A rootless alternative to Docker is using [Apptainer](https://apptainer.org/). In order to run NodeODM together with ClusterODM on HPC, we need a rootless alternative to Docker, and that's where Apptainer comes in to play. From the Linux command line, cd into the NodeODM folder and run the following commands to host a NodeODM instance:
+
+```
+apptainer build --sandbox node/ singularity.def
+apptainer run --writable node/ 
+```
+
 Linux users can connect to 127.0.0.1.
 
 * Open a Web Browser to `http://<yourDockerMachineIp>:3000`
diff --git a/singularity.def b/singularity.def
new file mode 100644
index 0000000..8c4e5e3
--- /dev/null
+++ b/singularity.def
@@ -0,0 +1,34 @@
+Bootstrap: docker
+From: opendronemap/odm:latest
+Stage: spython-base
+
+%files
+. /var/www
+%labels
+MAINTAINER Piero Toffanin <pt@masseranolabs.com>
+%post
+
+# EXPOSE 3000
+
+su -  root # USER root
+apt-get update && apt-get install -y curl gpg-agent
+curl --silent --location https://deb.nodesource.com/setup_14.x | bash -
+apt-get install -y nodejs unzip p7zip-full && npm install -g nodemon && \
+ln -s /code/SuperBuild/install/bin/untwine /usr/bin/untwine && \
+ln -s /code/SuperBuild/install/bin/entwine /usr/bin/entwine && \
+ln -s /code/SuperBuild/install/bin/pdal /usr/bin/pdal
+
+
+mkdir -p /var/www
+
+mkdir -p "/var/www"
+cd "/var/www"
+
+npm install --production && mkdir -p tmp
+
+%runscript
+cd "/var/www"
+exec /usr/bin/node /var/www/index.js "$@"
+%startscript
+cd "/var/www"
+exec /usr/bin/node /var/www/index.js "$@"