Update Error raising in uploads and image processing

src/web.py

@@ -44,7 +44,7 @@ class Web:
             file_uploaded = self.upload_file(image)
         except Exception as e:
             self.app.logger.error(e)
-            raise RuntimeError("Could not upload file") from e
+            raise RuntimeError("Could not upload file : " + str(e)) from e
 
         if file_uploaded:
             self.app.logger.debug("File has been uploaded, printing...")
@@ -100,7 +100,7 @@ class Web:
                     image.save(os.path.join(self.app.config["UPLOAD_FOLDER"], filename))
                 except OSError as e:
                     self.app.logger.error("Could not save file %s", e)
-                    return False
+                    raise RuntimeError("An OS error occured while uploading this file : " + str(e)) from e
 
                 self.app.logger.debug(
                     "File saved to "
@@ -111,7 +111,7 @@ class Web:
         self.app.logger.error(
             "Could not save file because the filename is forbidden"
         )
-        return False
+        raise RuntimeError("This file type is forbidden.")
 
     def get_queue_state(self):
         """Return current queue state"""