Add example Jenkinsfile for DooD builds

Shows how to use different Docker images per stage
in a Jenkins pipeline with Docker-out-of-Docker setup.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/doc/Jenkinsfile.example b/doc/Jenkinsfile.example
new file mode 100644
index 0000000..15d43d0
--- /dev/null
+++ b/doc/Jenkinsfile.example
@@ -0,0 +1,39 @@
+// Example Jenkinsfile for DooD (Docker-out-of-Docker) builds
+// Jenkins spawns a temporary container with the specified image,
+// runs the build inside it, and cleans up when done.
+
+pipeline {
+    // Each stage can use a different Docker image
+    agent none
+
+    stages {
+        stage('Build') {
+            agent {
+                docker { image 'node:20' }
+            }
+            steps {
+                sh 'npm install'
+                sh 'npm run build'
+            }
+        }
+
+        stage('Test') {
+            agent {
+                docker { image 'node:20' }
+            }
+            steps {
+                sh 'npm test'
+            }
+        }
+
+        // Example: stage with a different image
+        // stage('Deploy') {
+        //     agent {
+        //         docker { image 'alpine:latest' }
+        //     }
+        //     steps {
+        //         sh 'echo "Deploying..."'
+        //     }
+        // }
+    }
+}