Django not serving static files in deployment server

Question

I know this has been discussed before but nothing worked for me,

I deployed my first Django app yesterday with Nginx and gunicorn but sadly it is not serving the static files.

I have gone through every answer to the same problem but I couldn't find the way out.

Probably I am doing something wrong.

I am on django 2.1

all my static files are under project/static

Settings.py

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

I haven't mentioned any static dir because all the files are in static only.

urls.py ( is it necessary in deployment? )

static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

nginx.confg

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

my project is in root/project I don't know if it is a good practice or not I am quite a novice in this.