Update JSONNET

.drone.jsonnet

@@ -1,3 +1,7 @@
+local distros = ['centos7', 
+                 'debian10', 
+                 'debian11'];
+
 local docker_service() =
  {
    name: 'docker',
@@ -6,6 +10,12 @@ local docker_service() =
    volumes: { name: 'dockersock', path: '/var/run' },
  };
 
+ local pipeline(distribution) = {
+  kind: "pipeline",
+  type: "docker",
+  name: "%(distribution)" % { distribution: distribution }
+};
+
 local email_notification() =
  {
    name: 'notify by email',
@@ -39,17 +49,29 @@ local test_distro(distribution) =
      },
   };
 
-// Run the steps
-{
-  steps: [
+local gen_pipeline() = 
+  [{kind: 'pipeline',
+   type: 'docker',
+   name: 'Test on %(distro)s' % { distro: distro },
+   steps: [
     [test_distro('centos7'),
      email_notification()],
     [test_distro('debian10'),
      email_notification()],
     [test_distro('debian11'),
      email_notification()],
-  ],
-  services: [ 
-    docker_service(),
-  ]
-}
+   ],
+   services: [ 
+     docker_service(),
+   ],
+   volumes: 
+   {
+     name: 'dockersock',
+     temp: {}, 
+   },
+  }
+  for distro in distros];
+
+[
+  gen_pipeline(),
+]