My Django Project is not serving static files on Digital Ocean Server

My Project files are in the root directory. The settings.py of my project is

STATIC_URL = '/static/'
MEDIA_URL = '/media/'
STATICFILES_DIRS =['/root/templates/colorlib-regform-6']
STATIC_ROOT = '/root/static'
MEDIA_ROOT = '/root/media'

there are folders named static and media for holding static files

gunicorn is also working plus Nginx is also ok. No errors:

/etc/nginx/sites-available/Projectname

server {
    listen 80;
    server_name 104.131.89.148;

    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        root / ;
    }

    location / {
        include proxy_params;
        proxy_pass http://unix:/run/gunicorn.sock;
    }
}

Then I have tried restarting gunicorn and nginx plus

python3 manage.py collectstatic

This also works fine and static files are collected. Everything is working fine, except the server is not serving static files. The project works perfectly in local.

Any help or suggestions regarding this,