Workaround for srst2 mkfifo failure when using latest Nextflow and Singularity

.gitignore

@@ -11,3 +11,4 @@ data
 tests/test_data/output/*.txt
 tests/regression_test_data/test_data
 **/__pycache__
+*.img

nextflow.config

@@ -89,6 +89,8 @@ profiles {
              enabled = true
              autoMounts = true
              cacheDir = "$PWD"
+            // Prevent mkfifo failure in srst2 with Nextflow 23+ and Singularity
+             runOptions = '-B $(mktemp -d):/tmp'
         }
     }
 }