Enable CI

.drone.yml

@@ -0,0 +1,22 @@
+---
+kind: pipeline
+name: build
+
+steps:
+  - name: docker
+    image: plugins/docker
+    settings:
+      repo: vbrandl/yagcdn
+      auto_tag: true
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    ref:
+      - refs/heads/master
+      - refs/tags/v*
+---
+kind: signature
+hmac: e4d2267d9d412733f8d6e771e3c49f058f098dae534491a57d920a5deb25dd02
+
+...

backend/.drone.yml

@@ -1,15 +0,0 @@
----
-kind: pipeline
-name: build
-
-steps:
-  - name: docker
-    image: plugins/docker
-    ref:
-      - refs/heads/master
-      - refs/tags/v*
----
-kind: signature
-hmac: 1cc0785083f8c74e5fab2c191c65e6ca155a5fbd7b18a559f729b1426fb9511d
-
-...