Nginx not serving static files for Django app! Help!

I’ve wasted 2 entire days without any help on this issue. I followed this guide and have started my application on Digital Ocean. It’s a djago app. The issue is, it is not loading any static file! My nano /etc/nginx/sites-available/webapp_name file looks like this:

server {
    server_name domainname.com;

    access_log off;

    location /static/ {
        root /opt/bizkeeda;
    }

My static files are in folder: /opt/appname/static/

My settings.py file looks like this:

STATIC_URL = '/static/'

STATICFILES_DIR = '/opt/appname/static/'

STATIC_ROOT = '/opt/appname/static/'

I also tried changing STATIC_ROOT to /opt/appname

On checking url of static files on website, it is: www.domain.com:8001/static/js/abc.js

All 404 errors! What should I do?