Use go modules outside of GOPATH

Dockerfile

@@ -6,27 +6,10 @@ RUN apk add -U --no-cache git && \
 
 FROM golang:alpine
 
-WORKDIR /go/src/github.com/filebrowser/filebrowser
-
 COPY --from=base /go/bin /go/bin
+COPY get_deps.sh ./get_deps.sh
+
+ENV CGO_ENABLED 0
 
 RUN apk --no-cache -U upgrade && apk --no-cache add ca-certificates yarn git curl dos2unix && \
-  go get github.com/GeertJohan/go.rice/rice && \
-  curl -fsSL -o /go/bin/dep $( \
-    curl -s https://api.github.com/repos/golang/dep/releases/latest \
-    | grep "browser_download_url.*linux-amd64\"" \
-    | cut -d : -f 2,3 \
-    | tr -d \" \
-  ) && \
-  chmod +x /go/bin/dep && \
-  curl -sL https://git.io/goreleaser -o /go/bin/goreleaser && \
-  chmod +x /go/bin/goreleaser && \
-  curl -fsSL https://download.docker.com/linux/static/edge/x86_64/docker-18.05.0-ce.tgz | tar xvz --strip-components=1 docker/docker -C /go/bin && \
-  chmod +x /go/bin/docker && \
-  curl -fsSL $( \
-    curl -s https://api.github.com/repos/docker/docker-credential-helpers/releases/latest \
-    | grep "browser_download_url.*pass-.*-amd64"  \
-    | cut -d : -f 2,3 \
-    | tr -d \" \
-  ) | tar xv -C /go/bin && \
-  chmod + /go/bin/docker-credential-pass
+  chmod +x get_deps.sh && ./get_deps.sh && rm get_deps.sh

get_deps.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+#-- go.rice
+
+go get github.com/GeertJohan/go.rice/rice
+
+#-- goreleaser
+
+curl -sL https://git.io/goreleaser -o /go/bin/goreleaser
+
+chmod +x /go/bin/goreleaser
+
+#-- docker
+
+curl -fsSL https://download.docker.com/linux/static/edge/x86_64/docker-18.05.0-ce.tgz | tar xvz --strip-components=1 docker/docker -C /go/bin
+
+chmod +x /go/bin/docker
+
+#-- docker-credential-pass
+
+PASS_URL="$(curl -s https://api.github.com/repos/docker/docker-credential-helpers/releases/latest \
+  | grep "browser_download_url.*pass-.*-amd64" \
+  | cut -d : -f 2,3 \
+  | tr -d \")"
+
+if [ "$(echo "$PASS_URL" | cut -c2-6)" != "https" ]; then
+  PASS_URL="https://github.com/docker/docker-credential-helpers/releases/download/v0.6.0/docker-credential-pass-v0.6.0-amd64.tar.gz"
+fi
+
+curl -fsSL "$PASS_URL" | tar xv -C /go/bin
+
+chmod + /go/bin/docker-credential-pass