Database: Create Families table and its routers, controllers, migrations, seeds

[Darya-s]

Description

This PR creates new families table and its routers, controllers, migrations, seeds. Please provide a short summary explaining what this PR is about.

Fixes #202

How to test?

nom run db:clean npm run db:setup Please provide a short summary how your changes can be tested?

Checklist

• [X] I have performed a self-review of my own code
• [X] I have followed the name conventions for CSS Classnames and filenames, Components names and filenames, Style filenames, if you are in doubt check the the project README.MD and here https://github.com/HackYourFuture-CPH/curriculum/blob/master/review/review-checklist.md
• [X] I have commented my code, particularly in hard-to-understand areas, if you code was simple enough mark the box anyway
• [X] I have made corresponding changes to the documentation, if you code was simple enough mark the box anyway
• [X] This PR is ready to be merged and not breaking any other functionality

[Impressiv3]

You can solve the DB conflicts just by changing the seed file names. You need to move the seed file of the families before products.

[Darya-s]

You'll need to change the order of seed files, so families comes before products.

Thank you .. It worked ..

[Divyajg]

@Darya-s You need to update the database and solve conflicts. i) Solve the conflicts ii) Delete the tables in your local DB and run: npm run db:setup (that will update your DB to latest) iii) try check your end-points again for their functioning.