Remove old Dockerfile (#684)

setup/docker/vuls/latest/Dockerfile

@@ -1,34 +0,0 @@
-FROM golang:alpine as builder
-
-RUN apk add --no-cache \
-        git \
-        make \
-        gcc \
-        musl-dev
-
-ENV REPOSITORY github.com/future-architect/vuls
-RUN git clone https://$REPOSITORY.git $GOPATH/src/$REPOSITORY \
-    && cd $GOPATH/src/$REPOSITORY \
-    && make install
-
-
-FROM alpine:3.7
-
-MAINTAINER hikachan sadayuki-matsuno
-
-ENV LOGDIR /var/log/vuls
-ENV WORKDIR /vuls
-
-RUN apk add --no-cache \
-        openssh-client \
-        ca-certificates \
-    && mkdir -p $WORKDIR $LOGDIR
-
-COPY --from=builder /go/bin/vuls /usr/local/bin/
-
-VOLUME [$WORKDIR, $LOGDIR]
-WORKDIR $WORKDIR
-ENV PWD $WORKDIR
-
-ENTRYPOINT ["vuls"]
-CMD ["--help"]