Java Rest Server + Android APP

Java Rest Server + Android APP + PostgreSQL; The java Server will just use spring boot and spring security to create 5 CRUDS (8 small tables); The android app (material designs) will consume the server crud (just one, actually); Will be hosted on AWS; Another software outside the scope of this project will be in charge of the businnes rules. PS.: Need to make this project, but a health issue is preventing me to work on this;