Add initial draft of docs build

docs/build.gradle

@@ -0,0 +1,26 @@
+group 'apollo'
+version '0.0.1'
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'org.asciidoctor:asciidoctor-gradle-plugin:1.5.3'
+    }
+}
+
+apply plugin: 'org.asciidoctor.convert'
+apply plugin: 'java'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+asciidoctor {
+    sourceDir = file('src/asciidoc')
+    outputDir = file('build/docs')
+}