fix drone config

.drone.yml

@@ -2,6 +2,10 @@
 kind: pipeline
 name: build
 
+platform:
+  os: linux
+  arch: amd64
+
 steps:
 - name: assets
   image: node
@@ -19,12 +23,12 @@ steps:
   image: alpine
   commands:
   - mkdir dist/
-  - tar -zcvf . -f dist/hugo-geekdoc.tar.gz --exclude='.git*' --exclude='.drone*' --exclude='dist' --exclude='.git*' --exclude='example*' --exclude='src' --exclude='gulp*' --exclude='package*'
+  - tar -zcvf dist/hugo-geekdoc.tar.gz . --exclude='.git*' --exclude='.drone*' --exclude='dist' --exclude='.git*' --exclude='example*' --exclude='src' --exclude='gulp*' --exclude='package*'
 
 - name: checksum
   image: alpine
   commands:
-  - "cd dist/ && sha256sum * > ../sha256sum.txt"
+  - cd dist/ && sha256sum * > ../sha256sum.txt
 
 - name: publish
   image: plugins/github-release
@@ -32,17 +36,23 @@ steps:
     api_key:
       from_secret: github_token
     files:
-    - "dist/*"
+    - dist/*
     - sha256sum.txt
     note: CHANGELOG.md
     overwrite: true
-    title: "${DRONE_TAG}"
+    title: ${DRONE_TAG}
   when:
     ref:
-    - "refs/tags/**" 
+    - refs/tags/**
 
 trigger:
   ref:
   - refs/heads/master
   - refs/tags/**
   - refs/pull/**
+
+---
+kind: signature
+hmac: 549fc79b15dede6b3124796870db1ca1eeedd62da861ff33519b0c9126f5e74d
+
+...