Re-order the `make check` to ensure it passes first

The image building is very time consuming, so best to make sure we're working
with good bits to begin with

Jenkinsfile

@@ -8,6 +8,11 @@ pipeline {
     }
 
     stages {
+        stage('Test') {
+            steps {
+                sh 'make check'
+            }
+        }
         stage('Create builder') {
             steps {
                 sh 'make builder'
@@ -30,11 +35,6 @@ pipeline {
                 }
             }
         }
-        stage('Test') {
-            steps {
-                sh 'make check'
-            }
-        }
     }
     post {
         always {

README.adoc

@@ -10,3 +10,11 @@ has since been moved out to allow for more independent iteration on the master
 image itself.
 
 
+== Hacking
+
+=== Prerequisites
+
+* Git
+* GNU/Make
+* Docker
+* Docker Compose