#02 AS: integrated redis into the app and dockerized the app

[AdoshSingh]

Integrated redis into the app now the data from the database is fetched only once and cached.
Dockerized the app now the app runs with just one command.
Improved the directory structure moving tests alongside the files they are testing also written tests for controllers.

[height]

Link Height tasks by mentioning a task ID in the pull request title or commit messages, or description and comments with the keyword link (e.g. "Link T-123").

💡Tip: You can also use "Close T-X" to automatically close a task when the pull request is merged.