Store sessions in database

[jarifibrahim]

Save information about the upcoming sessions and render those on the home page.
Information about sessions can be added/updated using the Admin interface.

[jarifibrahim]

@amarlearning @tapasweni-pathak @vaibhavsingh97 What do you think?

[vaibhavsingh97]

Sounds good to me 👍 😃

[amarlearning]

@jarifibrahim How much free space do we get on free Heroku container?

[jarifibrahim]

@amarlearning 10,000 rows

[vaibhavsingh97]

@jarifibrahim @amarlearning I am interested in solving this issue

[tapaswenipathak]

This is ✨.