IO-2039 Add unknown file type thumbnail.

util/serverInit.ts

@@ -24,6 +24,10 @@ export const FolderPaths = {
   VendorsFolder,
 };
 
+export const AssetPaths = {
+  File: "/assets/file.png",
+};
+
 export function JobRelativeFilePath(jobid: string, filename: string) {
   return path.join(FolderPaths.Jobs, jobid, filename);
 }