refactor: reduce the image volume

Dockerfile

@@ -4,15 +4,12 @@ RUN apk --update add --no-cache curl wget && \
     sh /asset.sh
 
 FROM alpine
-COPY . /tmp/xray
-COPY --from=asset /tmp/asset/ /tmp/xray/asset/
-RUN apk --update add --no-cache iptables ip6tables net-tools curl && \
+COPY ["./load.sh", "./tproxy.sh", "/etc/xray/"]
+COPY --from=asset /tmp/asset/ /etc/xray/asset/
+COPY --from=asset /tmp/xray/xray /usr/bin/
+RUN apk --update add --no-cache iptables ip6tables && \
     mkdir -p /etc/xray/conf && \
     mkdir -p /etc/xray/expose/log && \
     mkdir -p /etc/xray/expose/segment && \
-    mv /tmp/xray/tproxy.sh / && \
-    mv /tmp/xray/load.sh /etc/xray/ && \
-    mv /tmp/xray/asset/xray /usr/bin/ && \
-    mv /tmp/xray/asset /etc/xray/ && \
-    rm -rf /tmp/xray
+    mv /etc/xray/tproxy.sh /
 CMD ["sh","/tproxy.sh"]

asset.sh

@@ -2,15 +2,16 @@ get_github_latest_version() {
   VERSION=$(curl --silent "https://api.github.com/repos/$1/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/');
 }
 
+XRAY_DIR="/tmp/xray"
 ASSET_DIR="/tmp/asset"
-mkdir -p $ASSET_DIR/pkg
+mkdir -p $XRAY_DIR/pkg
 
 XRAY_PKG_NAME="Xray-linux-arm64-v8a.zip"
 get_github_latest_version "XTLS/Xray-core"
-wget -P $ASSET_DIR/pkg "https://hub.fastgit.org/XTLS/Xray-core/releases/download/$VERSION/$XRAY_PKG_NAME"
-unzip $ASSET_DIR/pkg/$XRAY_PKG_NAME -d /$ASSET_DIR/pkg
-cp $ASSET_DIR/pkg/xray $ASSET_DIR
-rm -rf $ASSET_DIR/pkg
+wget -P $XRAY_DIR/pkg "https://hub.fastgit.org/XTLS/Xray-core/releases/download/$VERSION/$XRAY_PKG_NAME"
+unzip $XRAY_DIR/pkg/$XRAY_PKG_NAME -d /$XRAY_DIR/pkg
+cp $XRAY_DIR/pkg/xray $XRAY_DIR
+rm -rf $XRAY_DIR/pkg
 
 get_github_latest_version "Loyalsoldier/v2ray-rules-dat"
 wget -P $ASSET_DIR "https://hub.fastgit.org/Loyalsoldier/v2ray-rules-dat/releases/download/$VERSION/geoip.dat"