Added Jenkinsfile (#1)

Jenkinsfile

@@ -0,0 +1,32 @@
+pipeline {
+  agent { label "dind" }
+
+  stages {
+
+    stage('Create Docker image') {
+      steps {
+        container('docker') {
+          sh """
+            docker build -t docker.cloud.cluster.fun/averagemarcus/blog:${env.GIT_COMMIT} .
+            """
+        }
+      }
+    }
+
+    stage('Publish Docker image') {
+      when { branch 'master' }
+      environment {
+        DOCKER_CREDS = credentials('Harbor')
+      }
+      steps {
+        container('docker') {
+          sh """
+            docker login docker.cloud.cluster.fun -u $DOCKER_CREDS_USR -p $DOCKER_CREDS_PSW
+            docker push docker.cloud.cluster.fun/averagemarcus/blog:${env.GIT_COMMIT}
+            """
+        }
+      }
+    }
+
+  }
+}