add drone config

.drone.yml

@@ -0,0 +1,14 @@
+pipeline:
+    build:
+        image: cbrgm/drone-hugo:latest
+        validate: true
+        url: https://rezept-schneider.de
+
+        deploy:
+            image: drillster/drone-rsync
+            hosts: [ "rezept-schneider.de" ]
+            target: /var/www/html/rezeptschneider
+            source: public/*
+            user: hugo
+            secrets: [ ssh-key ]
+