Revert "ISSUE-313-BUILDX"

Dockerfile

@@ -1,12 +1,6 @@
 # Default to Go 1.13
 ARG GO_VERSION=1.13
-FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine as build
-
-# Convert TARGETPLATFORM to GOARCH format
-# https://github.com/tonistiigi/xx
-COPY --from=tonistiigi/xx:golang / /
-
-ARG TARGETPLATFORM
+FROM golang:${GO_VERSION}-alpine as build
 
 # Necessary to run 'go get' and to compile the linked binary
 RUN apk add git musl-dev