Only attempt to docker build when version tag is rolled.

.drone.yml

@@ -1,6 +1,6 @@
 kind: pipeline
 type: docker
-name: linux-amd64
+name: linux-amd64-taggedver
 
 platform:
   arch: amd64
@@ -32,3 +32,32 @@ steps:
       event:
       - push
       - tag
+
+trigger:
+  ref:
+  - refs/tags/v*
+
+---
+kind: pipeline
+type: docker
+name: linux-amd64-devel-master
+
+platform:
+  arch: amd64
+  os: linux
+
+steps:
+- name: build
+  image: golang
+  commands:
+  - pwd
+  - mkdir -p /go/src/git.martyn.berlin/martyn
+  - ln -s /drone/src /go/src/git.martyn.berlin/martyn/karaokards
+  - cd /go/src/git.martyn.berlin/martyn/karaokards
+  - go get
+  - go build
+
+trigger:
+  ref:
+  - refs/heads/devel
+  - refs/heads/master