Dockerfile: set GO111MODULE=off

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -32,6 +32,7 @@ FROM golang:${GO_VERSION}-stretch AS base
 ARG APT_MIRROR
 RUN sed -ri "s/(httpredir|deb).debian.org/${APT_MIRROR:-deb.debian.org}/g" /etc/apt/sources.list \
  && sed -ri "s/(security).debian.org/${APT_MIRROR:-security.debian.org}/g" /etc/apt/sources.list
+ENV GO111MODULE=off
 
 FROM base AS criu
 ARG DEBIAN_FRONTEND

Dockerfile.e2e

@@ -1,7 +1,7 @@
 ARG GO_VERSION=1.12.9
 
 FROM golang:${GO_VERSION}-alpine AS base
-
+ENV GO111MODULE=off
 RUN apk --no-cache add \
     bash \
     btrfs-progs-dev \

Dockerfile.simple

@@ -8,6 +8,7 @@
 ARG GO_VERSION=1.12.9
 
 FROM golang:${GO_VERSION}-stretch
+ENV GO111MODULE=off
 
 # allow replacing httpredir or deb mirror
 ARG APT_MIRROR=deb.debian.org

Dockerfile.windows

@@ -173,6 +173,7 @@ ARG GO_VERSION=1.12.9
 ENV GO_VERSION=${GO_VERSION} `
     GIT_VERSION=2.11.1 `
     GOPATH=C:\gopath `
+    GO111MODULE=off `
     FROM_DOCKERFILE=1
 
 RUN `