Added drone config

.drone.yml

@@ -0,0 +1,56 @@
+workspace:
+  base: /srv/app
+
+clone:
+  git:
+    image: plugins/git
+    depth: 50
+    tags: true
+
+  build:
+    image: node
+    pull: true
+    group: build-static
+    commands:
+      - npm install
+      - npm run lint
+      - npm run build
+    when:
+      event: [push, tag, pull_request]
+
+  static:
+    image: karalabe/xgo-latest:latest
+    pull: true
+    commands:
+      - cd dist
+      - zip -r ../vikunja-frontend.zip *
+      - cd ..
+    when:
+      event: [tag, push]
+
+  # Push the releases to our pseudo-s3-bucket
+  release:
+    image: plugins/s3:1
+    pull: true
+    secrets: [ aws_access_key_id, aws_secret_access_key ]
+    bucket: vikunja
+    endpoint: https://storage.kolaente.de
+    path_style: true
+    source: vikunja-frontend.zip
+    target: /${DRONE_TAG##v}
+    when:
+      event: [ tag ]
+
+  release:
+    image: plugins/s3:1
+    pull: true
+    secrets: [ aws_access_key_id, aws_secret_access_key ]
+    bucket: vikunja
+    endpoint: https://storage.kolaente.de
+    path_style: true
+    source: vikunja-frontend.zip
+    target: /master
+    when:
+      event: [ push ]
+      branch: [ master ]
+