Update Dockerfile

Dockerfile

@@ -1,25 +1,9 @@
 FROM finab/bark-server:latest
 
-
-LABEL maintainer="mritd <mritd@linux.com>"
-
-# set up nsswitch.conf for Go's "netgo" implementation
-# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
-# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
-RUN echo 'hosts: files dns' > /etc/nsswitch.conf
-
-# default timezon
-# override it with `--build-arg TIMEZONE=xxxx`
 ARG TIMEZONE=Asia/Shanghai
 
 ENV TZ=${TIMEZONE}
 
-RUN set -ex \
-    && apk upgrade \
-    && apk add --no-cache bash ca-certificates tzdata \
-    && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
-    && echo ${TZ} > /etc/timezone
-
 COPY --from=builder /go/bin/bark-server /usr/local/bin/bark-server
 COPY --from=builder /go/src/github.com/finb/bark-server/deploy/entrypoint.sh /entrypoint.sh