add drone pipeline

.drone.yml

@@ -0,0 +1,29 @@
+kind: pipeline
+type: exec
+name: Build and Deploy
+
+steps:
+  - name: Prepare
+    commands:
+      - eval $(ssh-agent -s)
+      - ssh-add - <<< "${SSH_PRIVATE_KEY}"
+    environment:
+      SSH_PRIVATE_KEY:
+        from_secret: SSH_PRIVATE_KEY
+
+  - name: Build
+    commands:
+      - hugo --gc
+
+  - name: Deploy
+    commands:
+      - scp -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -r public/* deployer@selfprivacy.org:/var/www/selfprivacy.org
+
+trigger:
+  event:
+    - push
+  branch:
+    - master
+
+node:
+  server: builder