Make sure you have Meteor installed on you machine
git clone https://github.com/alexcambose/zound
cd zound && npm install
meteor run - runs a meteor development server
meteor run android[-device] - builts and installs the app in emulator or on your device
Make sure you have Android SDK, Gradle and JDK(preferably JDK 8), you also need to have ANDROID_HOME and JAVA_HOME environment variables set.
Example:
export ANDROID_HOME=$HOME/Android/Sdk
export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/
export PATH=$JAVA_HOME/bin:$PATH
after these steps you should successfully run npm run build wich will create a build directory (you may need to modify the build script to fit your needs). For more info see official meteor build docs.