Add Jenkinsfile and supporting Dockerfile

Dockerfile

@@ -0,0 +1,5 @@
+FROM ubuntu:latest
+
+RUN apt-get update \
+ && apt-get upgrade -y \
+ && apt-get install -y build-essential cmake default-jdk-headless

Jenkinsfile

@@ -0,0 +1,22 @@
+pipeline {
+    agent {
+        dockerfile {
+            filename 'Dockerfile.build'
+            label 'crafting-interpreters-build'
+        }
+    }
+
+    stages {
+        stage('Build') {
+            steps {
+                cmakeBuild generator: 'Make',
+                    buildDir: 'build',
+                    sourceDir: 'src',
+                    installation: 'InSearchPath'
+                archiveArtifacts artifacts: 'Lox.jar',
+                    fingerprint: false,
+                    onlyIfSuccessful: true
+            }
+        }
+    }
+}