use different base img

.drone.yml

@@ -4,13 +4,10 @@ name: default
 
 steps:
 - name: clone_github
-  image: ubuntu
+  image: alpine/git
+  pull: always
   commands:
-    - apt update
-    - apt install -y git
     - git clone https://github.com/librespeed/speedtest-go.git
-    - pwd
-    - ls .
 
 - name: kaniko
   image: plugins/kaniko
@@ -22,6 +19,7 @@ steps:
     password:
       from_secret: DOCKER_PASSWORD
     context: /drone/src/speedtest-go
+    dockerfile: /drone/src/speedtest-go/Dockerfile
     tags:
       - latest
       - ${DRONE_BUILD_NUMBER}