The absolute bare minimum install instructions, for an iOS dev who maybe hasn't done any Android
1 - Install the Android SDK
2 - Go here and download the .zip file for Mac under “Command Line Tools Only” On the command line, run the following commands:
sdkmanager “platforms;android-28”
cd ~/Library/Android/sdk
export ANDROID_HOME=~/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platorm-tools
source ~/.bash_profile
3 - Download IntelliJ Community: https://www.jetbrains.com/idea/download/#section=mac
4 - git clone https://github.com/touchlab/DroidconKotlin
5 - Go to the “Terminal” tab on the bottom and run: ./gradlew build
6 - Right click on “DroidconKotlin” in the “Project” tab on the left and select “Reveal in Finder”
7 - Go to "/iosApp/” and open “iosApp.xcworkspace”
8 - Run the app!