add Dockerfile and build script

Dockerfile

@@ -0,0 +1,12 @@
+FROM docker.io/library/golang:1.17-alpine3.14 as build
+RUN apk --no-cache add make build-base git
+ARG GONOSUMDB
+ARG GOPROXY
+ARG GOBIN=/opt/bin
+ARG RELEASE="${RELEASE:-undefined}"
+WORKDIR /build
+ADD . .
+RUN STATIC=true make install
+
+FROM scratch
+COPY --from=build /opt/bin/goget /