Salt formula for ElectrumX server
Based on https://github.com/bauerj/electrumx-installer
Tested on Debian 9
electrumx_repo variable in init.slspillar-example.sls)init.sls:include python-alt-37). You can get it at https://github.com/knek-little-projects/salt-formula-python-alt-37 or change it to another python3.7 formula.