Upgrade Go and Alpine

.drone.yml

@@ -4,7 +4,7 @@ name: default
 
 steps:
 - name: test
-  image: golang:1.14.4
+  image: golang:1.16.3
   commands:
   - go test -v
   - go build

Dockerfile

@@ -1,8 +1,8 @@
-FROM golang:1.14.4-alpine3.12 as builder
+FROM golang:1.16.3-alpine3.13 as builder
 WORKDIR /go/src/gitea.develooper.com/ask/drone-test
 ADD . .
 RUN CGO_ENABLED=1 GOOS=linux go build -o demo
 
-FROM alpine:3.12 as production
+FROM alpine:3.13 as production
 COPY --from=builder /go/src/gitea.develooper.com/ask/drone-test/demo .
 CMD ["./demo"]

go.mod

@@ -0,0 +1,3 @@
+module gitea.develooper.com/ask/drone-test
+
+go 1.16