Attempt to work-around outdated CA certificates in drone/git Docker image.

.drone.yml

@@ -14,6 +14,10 @@ services:
       MYSQL_ROOT_PASSWORD: test
       MYSQL_DATABASE: test
 
+clone:
+  git:
+    image: witten/drone-git
+
 steps:
 - name: build
   image: alpine:3.9
@@ -36,6 +40,10 @@ services:
       MYSQL_ROOT_PASSWORD: test
       MYSQL_DATABASE: test
 
+clone:
+  git:
+    image: witten/drone-git
+
 steps:
 - name: build
   image: alpine:3.10
@@ -58,6 +66,10 @@ services:
       MYSQL_ROOT_PASSWORD: test
       MYSQL_DATABASE: test
 
+clone:
+  git:
+    image: witten/drone-git
+
 steps:
 - name: build
   image: alpine:3.13