Created announcement model in announcements app

widget_group22/announcements/models.py

 from django.db import models
 
-# Create your models here.
+class Announcement(models.Model):
+    announcement_title = models.CharField(max_length=100)
+    announcement_body = models.CharField(max_length=400)
+    pub_date = models.DateField(auto_now_add = True)
+