docker fix

Author: ehsandeep

Dockerfile

@@ -1,6 +1,6 @@
 FROM golang:1.16-alpine AS builder
 RUN apk add --no-cache git
-RUN GO111MODULE=auto go get -v github.com/projectdiscovery/simplehttpserver/cmd/simplehttpserver
+RUN GO111MODULE=on go get -v github.com/projectdiscovery/simplehttpserver/cmd/simplehttpserver
 
 FROM alpine:latest
 RUN apk add --no-cache bind-tools ca-certificates