Parse JSON config from file instead of environment

Author: gdiggs

bin/bundler-audit

@@ -4,10 +4,12 @@ $LOAD_PATH.unshift(File.expand_path(File.join(File.dirname(__FILE__), "../lib"))
 
 require 'cc/engine/bundler_audit'
 
-def parse_engine_config(raw)
-  raw ? JSON.parse(raw) : {}
+engine_config = {}
+
+if File.exists?("/config.json")
+  engine_config = JSON.parse(File.read("/config.json"))
 end
-engine_config = parse_engine_config(ENV['ENGINE_CONFIG'])
+
 CC::Engine::BundlerAudit.new(
   directory: "/code", engine_config: engine_config, io: STDOUT
 ).run