Add debug loggin for temp file cleaning up insted throwing error

Author: RomanBurunkov

lib/tempFileHandler.js

@@ -23,6 +23,7 @@ module.exports = (options, fieldname, filename) => {
   let writePromise = Promise.resolve();
 
   const createWriteStream = () => {
+    debugLog(options, `Opening write stream for ${fieldname}->${filename}...`);
     writeStream = fs.createWriteStream(tempFilePath);
     writePromise = new Promise((resolve, reject) => {
       writeStream.on('finish', () => {
@@ -62,7 +63,10 @@ module.exports = (options, fieldname, filename) => {
       if (writeStream !== false) {
         debugLog(options, `Cleaning up temporary file ${tempFilePath}...`);
         writeStream.end();
-        deleteFile(tempFilePath, (err) => { if (err) throw err; });
+        deleteFile(tempFilePath, err => (err 
+          ? debugLog(options, `Cleaning up temporary file ${tempFilePath} failed: ${err}`)
+          : debugLog(options, `Cleaning up temporary file ${tempFilePath} done.`)
+        ));
       }
     },
     getWritePromise: () => writePromise