Add Drone CI

.drone.yml

@@ -0,0 +1,20 @@
+---
+kind: pipeline
+name: deploy to swarm-test.autonomic.zone
+steps:
+  - name: deployment
+    image: decentral1se/stack-ssh-deploy:latest
+    settings:
+      host: swarm-test.autonomic.zone
+      stack: drone
+      deploy_key:
+        from_secret: drone_ssh_swarm_test
+      generate_secrets: true
+      purge: true
+    environment:
+      DOMAIN: drone.swarm-test.autonomic.zone
+      STACK_NAME: drone
+      LETS_ENCRYPT_ENV: production
+trigger:
+  branch:
+    - master

.envrc.sample

@@ -1,5 +1,9 @@
-export DOMAIN=drone.autonomic.zone
-export GITEA_CLIENT_ID=barfoo
-export GITEA_CLIENT_SECRET=foobar
-export LETS_ENCRYPT_ENV=production
+export SERVICE=drone
 export STACK_NAME=drone
+
+export DOMAIN=drone.autonomic.zone
+export LETS_ENCRYPT_ENV=production
+
+# Gitea Single Sign On
+#export GITEA_CLIENT_ID=barfoo
+#export GITEA_CLIENT_SECRET=foobar