Added Singularityfile.sh to the repository.

Singularityfile.sh

+#!/bin/bash
+
+#You can not run docker on many high performance computing systems
+#due to sudo permissions etc.
+#However, singularity can be run on them. Due to this reason, I prepared
+#this file to show how you can prepare a singulartiy sif file from docker
+#image of PRESCOTT.
+
+#STEP 0: First thing first! You must have singularity installed on your system.
+#        If not, you can find the installation instructions here:
+#        https://github.com/sylabs/singularity/blob/main/INSTALL.md
+#        In addition, there are different releases(deb, rpm or source) in the following page:
+#        https://github.com/sylabs/singularity/releases
+
+#STEP 1: Building singularity sandbox from the docker image online:
+#        Please note that you will need to change (v1.5.0) to the version you want
+#        if there is an update in the version. 
+singularity build --sandbox prescott-docker-v1.5.0 docker://tekpinar/prescott-docker:v1.5.0
+
+#STEP 2: Converting the folder to a single sif file:
+singularity build prescott-docker-v1.5.0.sif prescott-docker-v1.5.0
+
+#STEP 3: Running escott with the sif file:
+singularity exec prescott-docker-v1.5.0.sif escott -h
+
+#STEP 4: Running prescott with the sif file:
+singularity exec prescott-docker-v1.5.0.sif prescott -h