Automate build of this project

[woodser]

This issue requests help automating the build of this project.

For comparison, Cake Wallet's automated build process is documented here: https://github.com/fotolockr/CakeWallet

And Monerujo's build process is documented here: https://github.com/m2049r/xmrwallet/blob/master/doc/BUILDING-external-libs.md

Ideally this project would contain a shell script to be executed one time which downloads and builds all dependencies, but any contributions that get closer to that are welcome.

[rock77217]

I create a docker build for your library to using on Android.
Please feel free to take a look if it helpful.
monero_docker_build

[woodser]

@rock77217 This is cool! I haven't dug in yet, but it would be great to have docker scripts for Android included in the monero-cpp and monero-java projects.