v2.0.0

• Moved the mongoDB database from local to online (cloud) and build connection successfully.
• The download Page layout has been changed and filters are carried out smoothly.
• Pagination feature is added in download page.

The next part:

• Few issues:
  • If the user sets the attribute wrong and uploads the pdf
  • If the user tries to upload the pdf which is already present.
• Move Front-end and Back-end to online hosting.