Added docker-compose.yaml and updated README.md

[SAMAD101]

#24

[Mr-Sunglasses]

@SAMAD101 Do we need a compose file? We are not using any db or so, and our CI works well with docker file, is there any other need for which we need a compose file.

[SAMAD101]

@Mr-Sunglasses Well yeah, but imo just doing docker-compose up and done feels quite satisfying and easy. And I think we can use some db like Redis in the future, and with a better frontend for web form and /paste/{uuid}