Sending Email with Image inside the body of the html - Django

Question

I know that there have been questions like this on the site, but none of them have been able to answer my difficulty. So I have the code as following:

# custom_methods.py

from django.core.mail import EmailMultiAlternatives
from django.conf import settings

from pathlib import Path
from email.mime.image import MIMEImage

import threading, random, os

class EmailThread(threading.Thread):
    def __init__(self, subject, body, from_email, recipient_list, fail_silently, html):
        self.subject = subject
        self.body = body
        self.from_email = from_email
        self.recipient_list = recipient_list
        self.fail_silently = fail_silently
        self.html = html
        threading.Thread.__init__(self)

    def run(self):
        msg = EmailMultiAlternatives(self.subject, self.body, self.from_email, self.recipient_list)
        image_path = os.path.join(settings.BASE_DIR, '/static/images/instagram_icon.png')
        image_name = Path(image_path).name
        if self.html:
            msg.attach_alternative(self.html, "text/html")
            msg.content_subtype = 'html'
            msg.mixed_subtype = 'related'

            with open(image_path, 'rb') as f:
                image = MIMEImage(f.read())
                image.add_header('Content-ID', f"<{image_name}>")
                msg.attach(image)
        msg.send(self.fail_silently)

def send_mail(subject, recipient_list, body='', from_email=settings.EMAIL_HOST_USER, fail_silently=False, html=None, *args, **kwargs):
    EmailThread(subject, body, from_email, recipient_list, fail_silently, html).start()

# views.py

class UserRegisterView(CreateView):
    model = User
    form_class = CustomUserCreationForm
    template_name = 'accounts/register.html'

    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.is_active = False
        self.object.save()
        send_mail(
            subject=f'{self.object.code} is your Instagram code',
            recipient_list=[self.object.email],
            html=render_to_string('accounts/register_email.html', {
                'email':self.object.email,
                'code':self.object.code,
            })
        )
        return redirect('accounts:login')

# register_email.html - This is the html that is connected to the email that will be sent

{% load static %}
{% load inlinecss %}

{% inlinecss "css/email.css" %}
<img src="cid:{image_name}">                    

<h1>Hi,</h1>
<h2>Someone tried to sign up for an Instagram account with {{ email }}. If it was you, enter this confirmation code in the app:</h2>
<h2>{{ code }}</h2>
{% endinlinecss %}

So what suppose to happen is the following:

1. Register the user
2. When the user is registered, an email is sent to the user with the html template I've shown above.

Now everything works fine, but it goes wrong when I register the user, and in the Powershell, the following error pops:

with open(image_path, 'rb') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'C:/static/images/instagram_icon.png'

Of course the image cannot be found in the 'C:/static/images/instagram_icon.png', because the absolute directory of the image would be in 'C:Users/...(and so on).../static/images/instagram_icon.png'. Then how do I fix this problem in the development stage? I couldn't find the answer for this and can anybody help??