grim/goserve

Gross fix, but this will set the content type when we're serving up the custom 404 page
FROM golang:buster as build
WORKDIR /go/src/app
COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static" -s' .
FROM scratch
COPY --from=build /go/src/app/app /goserve
CMD ["/goserve"]