build Github Pages docs

Author: eli-darkly

build.gradle

@@ -4,6 +4,7 @@ apply plugin: 'signing'
 apply plugin: 'idea'
 apply plugin: 'com.github.johnrengelman.shadow'
 apply plugin: 'io.codearte.nexus-staging'
+apply plugin: 'org.ajoberstar.github-pages'
 
 import com.github.jengelman.gradle.plugins.shadow.tasks.ConfigureShadowRelocation