Add environments to Gradle build

gistfile1.groovy

def loadConfiguration() {
    def environment = hasProperty('env') ? env : 'dev'
    ext.environment = environment
    println "Environment is set to: $environment"
    
    def configFile = file('config.groovy')
    def config = new ConfigSlurper(environment).parse(configFile.toURL())
    ext.config = config
}