Update .drone.yml

.drone.yml

@@ -6,14 +6,10 @@ platform:
   os: linux
   arch: amd64
 
-workspace:
-  base: /go
-  path: src/github.com/go-gitea/lgtm
-
 steps:
 - name: test
   pull: always
-  image: golang:1.15
+  image: golang:1.15-alpine
   commands:
   - make clean
   - make vet
@@ -34,7 +30,7 @@ steps:
 
 - name: test-mysql
   pull: always
-  image: golang:1.15
+  image: golang:1.15-alpine
   commands:
   - make test-mysql
   settings:
@@ -46,7 +42,7 @@ steps:
 
 - name: test-pgsql
   pull: always
-  image: golang:1.15
+  image: golang:1.15-alpine
   commands:
   - make test-pgsql
   settings:
@@ -69,7 +65,7 @@ steps:
 
 - name: build
   pull: always
-  image: golang:1.15
+  image: golang:1.15-alpine
   commands:
   - make clean build
   settings: