jenkins: fixup pipeline into multibranch structure

Jenkinsfile

@@ -1,4 +1,11 @@
 pipeline {
+    agent none
+    stages {
+        stage('Main') {
+            when {
+                beforeAgent true
+                branch 'main'
+            }
             agent { label 'agent-12' }
             stages {
                 stage('Checkout') {
@@ -21,23 +28,25 @@ pipeline {
                 }
             }
         }
-
+        stage('Testing') {
-pipeline {
+            when {
+                beforeAgent true
+                not { branch 'main' }
+            }
             agent { label 'agent-13' }
-    stages {
+            stage('Test Checkout') {
-        stage('Checkout') {
                 steps {
                     checkout scm
                 }
             }
-        stage('Build') {
+            stage('Test Build') {
                 steps {
                     script {
-                    docker.build('trianta.dev:latest')
+                        docker.build('test.trianta.dev:latest')
                     }
                 }
             }
-        stage('Deploy') {
+            stage('Test Deploy') {
                 steps {
                     sh 'docker stop test.trianta.dev && docker rm test.trianta.dev || exit 0'
                     sh 'docker run -d -e USER=scv -e USER_UID=1001-e USER_GID=1001 --restart=unless-stopped -p 3466:80 --name test.trianta.dev test.trianta.dev:latest'
@@ -45,3 +54,4 @@ pipeline {
             }
         }
     }
+}