add drone build

.drone.yml

@@ -0,0 +1,32 @@
+---
+kind: pipeline
+type: docker
+name: deb-build
+
+steps:
+
+ - name: build
+   image: ubuntu:22.04
+   commands:
+    - apt -y update
+    - apt -y install build-essential debhelper libssl-dev libpam-dev
+    - ./configure.sh
+    - make deb
+
+ - name: upload artifact
+   image: git.burble.dn42/burble.dn42/drone-gitea-pkg-plugin:latest
+   settings:
+     token:
+       from_secret: TOKEN
+     version: VERSION
+     artifact: emailrelay_2.5_amd64.deb
+     package: emailrelay
+     owner: burble.dn42
+     
+---
+kind: secret
+name: TOKEN
+get:
+  path: burble.dn42/kv/data/drone/git.burble.dn42
+  name: artifact-token
+