Zcash Core zcash core Zcash Formula zcash/zcash Zcash API Zcash RPC API Zcash Explorer zcha.in zecmate.com Build method docker build --build-arg ZCASH_VERSION=2.1.1 --build-arg GOSU_VERSION=1.11 -t zec-core:v2.1.1 -f Dockerfile .