switching to native fs module

src/backend/helpers/createSymlink.js

 const createSymlink = (body, uniqueDir) => {
-    const fs = require("fs-extra");
+    const fs = require("fs");
     const path = require("path");
     body.units.map((unit) => {
-        fs.symlinkSync(
+        fs.symlink(
             unit.fq1,
             path.join(uniqueDir, "data", path.basename(unit.fq1)),
             "file"
         );
-        fs.symlinkSync(
+        fs.symlink(
             unit.fq2,
             path.join(uniqueDir, "data", path.basename(unit.fq2)),
             "file"
         );
     });
-    fs.symlinkSync(
+    fs.symlink(
         body.genome,
         path.join(uniqueDir, "resources", "genome", path.basename(body.genome)),
         "file"
     );
     body.customAdapters == ""
         ? ""
-        : fs.symlinkSync(
+        : fs.symlink(
               body.adapters,
               path.join(
                   uniqueDir,

src/backend/helpers/createSymlinkComparison.js

 const createSymlinkComparison = (body, uniqueDir) => {
-    const fs = require("fs-extra");
+    const fs = require("fs");
     const path = require("path");
     body.comparisons.map((comparison) => {
         const controlFiles = comparison.control.split(",");
         const treatmentFiles = comparison.treatment.split(",");
 
         for (const file in controlFiles) {
-            fs.symlinkSync(
+            fs.symlink(
                 controlFiles[file],
                 path.join(uniqueDir, "data", path.basename(controlFiles[file])),
                 "file"
             );
         }
         for (const file in treatmentFiles) {
-            fs.symlinkSync(
+            fs.symlink(
                 treatmentFiles[file],
 
                 path.join(
@@ -25,13 +25,13 @@ const createSymlinkComparison = (body, uniqueDir) => {
             );
         }
     });
-    fs.symlinkSync(
+    fs.symlink(
         body.genome,
         path.join(uniqueDir, "resources", "genome", path.basename(body.genome)),
         "file"
     );
     body.annot !== ""
-        ? fs.symlinkSync(
+        ? fs.symlink(
               body.annot,
               path.join(
                   uniqueDir,