git: prepare for auto-deployment

.drone.yml

@@ -0,0 +1,15 @@
+---
+kind: pipeline
+type: exec
+name: Test NixOS configurations
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: Build core-services-01 on core-services-01
+  commands:
+  - "nix-build krops.nix -A test-core-services-01 && ./result"
+
+...

krops.nix

@@ -21,4 +21,10 @@ in
       source = source "core-services-01";
       target = "root@core01.internal.rz.ens.wtf";
     };
+
+    test-core-services-01 = pkgs.krops.writeTest "test-core-services-01" {
+      source = source "core-services-01";
+      target = "root@core01.internal.rz.ens.wtf";
+    };
+
   }