feat: refactor .drone.yml

* syntax as per https://github.com/drone/drone/blob/master/.drone.yml
* fixed wrong yaml indentation that drone had to chew on...
* added 'type: docker' and 'os: linux' to every pipeline where relevant

.drone.yml

@@ -1,8 +1,10 @@
 ---
 kind: pipeline
+type: docker
 name: dockerhub-build-trigger
 
 platform:
+  os: linux
   arch: amd64
 
 clone:
@@ -16,20 +18,21 @@ steps:
     ENDPOINT:
       from_secret: dockerhub_endpoint
   commands:
-    - apk add --no-cache curl
-    - curl -sO https://git.dotya.ml/wanderer/docker-fedora-hugo/raw/branch/master/curl.it
-    - bash ./curl.it $ENDPOINT
-
+  - apk add --no-cache curl
+  - curl -sO https://git.dotya.ml/wanderer/docker-fedora-hugo/raw/branch/master/curl.it
+  - bash ./curl.it $ENDPOINT
 
 ---
 kind: pipeline
+type: docker
 name: kaniko-build
 
 platform:
+  os: linux
   arch: amd64
 
 depends_on:
-  - dockerhub-build-trigger
+- dockerhub-build-trigger
 
 steps:
 - name: build
@@ -39,9 +42,9 @@ steps:
     dockerfile: Dockerfile
     context: .
 
-
 ---
 kind: pipeline
+type: docker
 name: notifications
 
 platform:
@@ -51,42 +54,43 @@ platform:
 clone:
   disable: true
 
+steps:
+- name: discord
+  pull: if-not-exists
+  image: appleboy/drone-discord:latest
+  settings:
+    message: >
+      {{#success build.status}}
+        ✅ [Build #{{build.number}}]({{build.link}}) of `{{repo.name}}` succeeded.
+        event: **`{{build.event}}`**
+        commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
+      {{else}}
+        ❌ [Build #{{build.number}}]({{build.link}}) of `{{repo.name}}` failed.
+        event: **`${DRONE_BUILD_EVENT}`**
+        commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
+        ```{{commit.message}}```
+      {{/success}}
+    webhook_id:
+      from_secret: discord_webhook_id
+    webhook_token:
+      from_secret: discord_webhook_token
+
 trigger:
   branch:
-    - master
+  - master
   event:
-    - push
-    - tag
+  - push
+  - tag
   status:
-    - success
-    - failure
+  - success
+  - failure
 
 depends_on:
-  - kaniko-build
-
-steps:
-  - name: discord
-    pull: if-not-exists
-    image: appleboy/drone-discord:latest
-    settings:
-      message: >
-        {{#success build.status}}
-          ✅ [Build #{{build.number}}]({{build.link}}) of `{{repo.name}}` succeeded.
-          event: **`{{build.event}}`**
-          commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
-        {{else}}
-          ❌ [Build #{{build.number}}]({{build.link}}) of `{{repo.name}}` failed.
-          event: **`${DRONE_BUILD_EVENT}`**
-          commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
-          ```{{commit.message}}```
-        {{/success}}
-      webhook_id:
-        from_secret: discord_webhook_id
-      webhook_token:
-        from_secret: discord_webhook_token
+- kaniko-build
 
 ---
 kind: pipeline
+type: docker
 name: notifications-cronbuild
 
 platform:
@@ -96,36 +100,36 @@ platform:
 clone:
   disable: true
 
+steps:
+- name: discord
+  pull: always
+  image: appleboy/drone-discord:latest
+  settings:
+    message: >
+      {{#success build.status}}
+        ✅ [Nightly build #{{build.number}}]({{build.link}}) of `{{repo.name}}` succeeded.
+        event: **`{{build.event}}`**
+        commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
+      {{else}}
+        ❌ [Nightly build #{{build.number}}]({{build.link}}) of `{{repo.name}}` failed.
+        event: **`${DRONE_BUILD_EVENT}`**
+        commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
+      {{/success}}
+    webhook_id:
+      from_secret: discord_webhook_hourly_id
+    webhook_token:
+      from_secret: discord_webhook_hourly_token
+
 trigger:
   branch:
-    - master
+  - master
   event:
-    - cron
+  - cron
   cron:
-    - nightly
+  - nightly
   status:
-    - success
-    - failure
+  - success
+  - failure
 
 depends_on:
-  - kaniko-build
-
-steps:
-  - name: discord
-    pull: always
-    image: appleboy/drone-discord:latest
-    settings:
-      message: >
-        {{#success build.status}}
-          ✅ [Nightly build #{{build.number}}]({{build.link}}) of `{{repo.name}}` succeeded.
-          event: **`{{build.event}}`**
-          commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
-        {{else}}
-          ❌ [Nightly build #{{build.number}}]({{build.link}}) of `{{repo.name}}` failed.
-          event: **`${DRONE_BUILD_EVENT}`**
-          commit [`${DRONE_COMMIT_SHA:0:7}`](https://git.dotya.ml/${DRONE_REPO}/commit/${DRONE_COMMIT_SHA}) by {{commit.author}} on `{{commit.branch}}`
-        {{/success}}
-      webhook_id:
-        from_secret: discord_webhook_hourly_id
-      webhook_token:
-        from_secret: discord_webhook_hourly_token
+- kaniko-build