Serve media files from outside the Django-project-folder with Nginx

I’m trying to serve in production (not development) media files for my Django-project with a Nginx-server. The media-files are not located within the django-folder.

The folder structure is like:

|- django_user
|     |- media
|     |- Myproject
|          |- static
|          |- myproject
|               |- settings.py

Nginx-Server:

upstream websocket{
        server 127.0.0.1:6379;
}
server {
    server_name myproject.com;

    client_max_body_size 5M;

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

    location /media/ {
        root /home/django_user/media;
    }

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

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/myproject.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/myproject.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

    location /ws {
        proxy_pass http://websocket;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Host $server_name;
        proxy_set_header X-Forwarded-Proto  $scheme;
    }

}
server {
    if ($host = myproject.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    server_name myproject.com
    return 404; # managed by Certbot


}

Here is a part of my settings.py:

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

STATIC_URL = '/static/'

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

MEDIA_ROOT = '/home/django_user/media'

MEDIA_URL = '/media/'

Saving files in the media folder is working. I’ve set up an image field like this:

myicon = models.ImageField(default="static/images/default_icon.png" , blank=True, upload_to="images/")

I’ve checked it and the images (e.g. test.png) are correctly saved in /home/django_user/media/images. My problem is that the images in the media-folder cannot be shown on my website (myproject.com/images/test.png), it always shows me:

Not Found
The requested resource was not found on this server.

I’ve done already "manage.py collectstatic", and static files are loaded correctly. Only the media-files are not found.

I’ve also tried the following variations of my nginx-server, all without success:

location /media/ {
     root /home/django_user;
}

location /media {
     root /home/django_user/media/;
}

location /media {
     root /home/django_user/;
}

location /media/ {
    alias /home/django_user/media/;
}

Can you help me with this problem? What am I missing here or where is my mistake?