1. Database Setup (Postgres):

   CREATE DATABASE shopme;
   CREATE USER shopmeuser WITH ENCRYPTED PASSWORD 'shopmepass';
   GRANT ALL PRIVILEGES ON DATABASE shopme TO shopmeuser;

2. Once DB has been setup, download the repo and launch it in IntelliJ IDE.
3. Update DB credentials in application.yaml file inside src/main/resources directory path.
4. Run the project.
5. All Done!! Click Here to interact with your app:

Assumptions: IntelliJ IDE, Java (Open JDK 1.7+) and Postgres DB have been setup and is running prior to starting with this project.

References: For Complete details, please refer Spring Boot Connect to PostgreSQL Database Examples - the source article for this Repo.