It's all about Spring Boot

Building a Spring Boot application with Rest API

• This link has the simplest Rest API building example: https://spring.io/guides/gs/rest-service/
• Also check out the links at the end of the page of https://spring.io/guides/gs/rest-service/ and you will learn almost everything using Spring Boot.
• Also check this page too: https://spring.io/guides#getting-started-guides

Building a Spring Boot and ReactJS mono-repo application

• Look no further! This link has all listed out all the details: https://github.com/kantega/react-and-spring

Spring Boot application with Postgresql on Heroku

• On Mac, brew install Postgresql
• Some useful commands to work with Postgresql on local:
• By default, Postgresql is already started. If not, use this command to manually start the Postgresql
  pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start
• To turn-off Postgresql manually, use this command pg_ctl -D /usr/local/var/postgres stop -s -m fast
• To access Postgres from command prompt: psql postgres -U kad221
• To stop the access to Postgres from command prompt: quit psql CMD+D
• Follow the instructions to set up and push the spring boot application to Heroku: https://devcenter.heroku.com/articles/deploying-spring-boot-apps-to-heroku
• In Heroku dashboard, select the spring boot application that is deployed.
• Go to Resources, click on the Heroku Postgres, click on settings > View Credentials > Copy URI.
• From command prompt: psql <paste the URI here> and hit enter.
• In application.properties, add spring.datasource.url: <paste URI here>
• From command prompt, run ./mvnw spring-boot:run, and you are good to go with the development.