Run CI pipeline test with Alpine

.drone.yml

@@ -9,7 +9,7 @@ steps:
   command: ["build"]
 
 - name: deploy
-  image: ubuntu
+  image: alpine:latest
 
   environment:
     HOST:
@@ -26,12 +26,9 @@ steps:
     - main
 
   commands:
-  - apt-get update -qq > /dev/null
-  - apt-get install ssh rsync -qq > /dev/null
+  - apt-get update
+  - apt-get add openssh rsync
   - eval $(ssh-agent -s)
   - mkdir -p ~/.ssh
   - echo "$RSYNC_KEY" > ~/.ssh/id_rsa
   - chmod 600 ~/.ssh/id_rsa
-  - ssh-add
-  - echo "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
-  - rsync -rP public/ "$${USER}@$${HOST}:$${PATH}"