Upgrade to alpine 3.14

Author: nwnt

Dockerfile

@@ -4,7 +4,7 @@ ADD . .
 RUN apk --no-cache add git
 RUN CGO_ENABLED=0 go install -a -trimpath -ldflags "-s -w -X go.k6.io/k6/lib/consts.VersionDetails=$(date -u +"%FT%T%z")/$(git describe --always --long --dirty)"
 
-FROM alpine:3.13
+FROM alpine:3.14
 RUN apk add --no-cache ca-certificates && \
     adduser -D -u 12345 -g 12345 k6
 COPY --from=builder /go/bin/k6 /usr/bin/k6