Migrate configs to drone 1.0.0 and drop appveyor

.drone.windows.yml

@@ -0,0 +1,70 @@
+---
+kind: pipeline
+name: linux-amd64
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: build
+  pull: always
+  image: golang:1.11
+  commands:
+  - "go build -v -ldflags \"-X main.build=${DRONE_BUILD_NUMBER}\" -a -o release/linux/amd64/drone-hugo"
+  environment:
+    CGO_ENABLED: 0
+    GO111MODULE: on
+  when:
+    event:
+    - push
+    - pull_request
+
+- name: build
+  pull: always
+  image: golang:1.11
+  commands:
+  - "go build -v -ldflags \"-X main.version=${DRONE_TAG##v} -X main.build=${DRONE_BUILD_NUMBER}\" -a -o release/linux/amd64/drone-hugo"
+  environment:
+    CGO_ENABLED: 0
+    GO111MODULE: on
+  when:
+    event:
+    - tag
+
+- name: dryrun
+  pull: always
+  image: plugins/docker:linux-amd64
+  settings:
+    dockerfile: docker/Dockerfile.linux.amd64
+    dry_run: true
+    password:
+      from_secret: docker_password
+    repo: plugins/hugo
+    tags: linux-amd64
+    username:
+      from_secret: docker_username
+  when:
+    event:
+    - pull_request
+
+- name: publish
+  pull: always
+  image: plugins/docker:linux-amd64
+  settings:
+    auto_tag: true
+    auto_tag_suffix: linux-amd64
+    dockerfile: docker/Dockerfile.linux.amd64
+    password:
+      from_secret: docker_password
+    repo: plugins/hugo
+    username:
+      from_secret: docker_username
+  when:
+    event:
+    - push
+    - tag
+
+trigger:
+  branch:
+  - master