diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index dc2c1c2ab1..0000000000
--- a/Dockerfile
+++ /dev/null
@@ -1,6 +0,0 @@
-FROM alpine:3.13
-
-COPY . /
-RUN apk add --no-cache tini libc6-compat && chmod +x /entrypoint.server.sh && chmod +x /opt/easegress/bin/*
-
-ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.server.sh"]
diff --git a/build/package/Dockerfile b/build/package/Dockerfile
index 98d90fe7c1..eccdafa4cd 100644
--- a/build/package/Dockerfile
+++ b/build/package/Dockerfile
@@ -8,14 +8,14 @@ RUN make clean && make build
 
 # ---
 
-FROM alpine:3.13
+FROM alpine:latest
 
 WORKDIR /opt/easegress
 
 COPY build/package/entrypoint.sh /
 COPY --from=builder /opt/easegress/bin/ /opt/easegress/bin/
 
-RUN apk --no-cache add tini && \
+RUN apk --no-cache add tini tzdata && \
         chmod +x /entrypoint.sh /opt/easegress/bin/*
 
 ENV PATH /opt/easegress/bin:$PATH
diff --git a/build/package/Dockerfile.goreleaser b/build/package/Dockerfile.goreleaser
index 7a96783f79..2b769927dc 100644
--- a/build/package/Dockerfile.goreleaser
+++ b/build/package/Dockerfile.goreleaser
@@ -1,11 +1,11 @@
-FROM alpine:3.13
+FROM alpine:latest
 
 WORKDIR /opt/easegress
 
 ADD egctl easegress-server /opt/easegress/bin/
 COPY build/package/entrypoint.sh /
 
-RUN apk --no-cache add tini && \
+RUN apk --no-cache add tini tzdata && \
         chmod +x /entrypoint.sh /opt/easegress/bin/*
 
 ENV PATH /opt/easegress/bin:$PATH
diff --git a/release/build-client-image.sh b/release/build-client-image.sh
deleted file mode 100755
index 157094ecaa..0000000000
--- a/release/build-client-image.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-pushd $(dirname $0) > /dev/null
-SCRIPTPATH=$(pwd -P)
-popd > /dev/null
-SCRIPTFILE=$(basename $0)
-
-function log() {
-    echo "================================================================================"
-    echo "$(date +'%Y-%m-%d %H:%M:%S%z') [INFO] - $@"
-    echo ""
-}
-
-function err() {
-    echo "================================================================================"
-    echo "$(date +'%Y-%m-%d %H:%M:%S%z') [ERRO] - $@" >&2
-}
-
-# ================================================================================
-
-log "Build easegress client image.."
-
-cd ${SCRIPTPATH}/..
-make build_client_alpine
diff --git a/release/build-server-image.sh b/release/build-server-image.sh
deleted file mode 100755
index 1e628e667f..0000000000
--- a/release/build-server-image.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-pushd $(dirname $0) > /dev/null
-SCRIPTPATH=$(pwd -P)
-popd > /dev/null
-SCRIPTFILE=$(basename $0)
-
-function log() {
-    echo "================================================================================"
-    echo "$(date +'%Y-%m-%d %H:%M:%S%z') [INFO] - $@"
-    echo ""
-}
-
-function err() {
-    echo "================================================================================"
-    echo "$(date +'%Y-%m-%d %H:%M:%S%z') [ERRO] - $@" >&2
-}
-
-# ================================================================================
-
-log "Build easegress server image.."
-
-cd ${SCRIPTPATH}/..
-make build_server_alpine
-# make build_server_ubuntu