diff --git a/entrypoint.sh b/entrypoint.sh
index 55db888..b16a4ef 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,56 +1,72 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-echo "=================================================="
+set -euo pipefail
 
-echo "參數檢查"
+separator() {
+    printf '%s\n' "=================================================="
+}
 
-echo "--------------------------------------------------"
+section() {
+    printf '\n%s\n' "$1"
+    printf '%s\n' "--------------------------------------------------"
+}
 
-# 顯示 GITEA_SERVER_URL 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "GITEA_SERVER_URL=$GITEA_SERVER_URL" && ([ -z "$GITEA_SERVER_URL" ] || [ "$GITEA_SERVER_URL" = "null" ]) && exit 1
+require_var() {
+    local name="$1"
+    local value="${!name:-}"
 
-# 顯示 GITEA_REPOSITORY 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "GITEA_REPOSITORY=$GITEA_REPOSITORY" && ([ -z "$GITEA_REPOSITORY" ] || [ "$GITEA_REPOSITORY" = "null" ]) && exit 1
+    printf '%s=%s\n' "$name" "$value"
+    if [ -z "$value" ] || [ "$value" = "null" ]; then
+        printf '錯誤: %s 不可為空或 null\n' "$name" >&2
+        exit 1
+    fi
+}
 
-# 顯示 CONFIGURATION 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "CONFIGURATION=$CONFIGURATION" && ([ -z "$CONFIGURATION" ] || [ "$CONFIGURATION" = "null" ]) && exit 1
+separator
+section "參數檢查"
 
-# 顯示 RELEASE_PROJECT 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "RELEASE_PROJECT=$RELEASE_PROJECT" && ([ -z "$RELEASE_PROJECT" ] || [ "$RELEASE_PROJECT" = "null" ]) && exit 1
+require_var GITEA_SERVER_URL
+require_var GITEA_REPOSITORY
+require_var CONFIGURATION
+require_var RELEASE_PROJECT
+require_var RELEASE_VERSION
+require_var RELEASE_AUTHOR
+require_var RELEASE_COMPANY
+require_var RELEASE_DESCRIPTION
 
-# 顯示 RELEASE_VERSION 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "RELEASE_VERSION=$RELEASE_VERSION" && ([ -z "$RELEASE_VERSION" ] || [ "$RELEASE_VERSION" = "null" ]) && exit 1
+readonly RELEASE_COPYRIGHT="Copyright (c) $(date +%Y) ${RELEASE_COMPANY}"
+readonly RELEASE_URL="${GITEA_SERVER_URL}/${GITEA_REPOSITORY}/src/branch/master"
+readonly OUTPUT_DIR="${WORKSPACE}/output"
 
-# 顯示 RELEASE_AUTHOR 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "RELEASE_AUTHOR=$RELEASE_AUTHOR" && ([ -z "$RELEASE_AUTHOR" ] || [ "$RELEASE_AUTHOR" = "null" ]) && exit 1
+printf 'RELEASE_COPYRIGHT=%s\n' "$RELEASE_COPYRIGHT"
+printf 'RELEASE_URL=%s\n' "$RELEASE_URL"
+printf 'OUTPUT_DIR=%s\n' "$OUTPUT_DIR"
 
-# 顯示 RELEASE_COMPANY 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "RELEASE_COMPANY=$RELEASE_COMPANY" && ([ -z "$RELEASE_COMPANY" ] || [ "$RELEASE_COMPANY" = "null" ]) && exit 1
+section "打包 NUGET 套件"
 
-# 組合 RELEASE_COPYRIGHT 參數並顯示
-RELEASE_COPYRIGHT=$(date +%Y)
-RELEASE_COPYRIGHT="Copyright©$RELEASE_COPYRIGHT $RELEASE_COMPANY" && echo "RELEASE_COPYRIGHT=$RELEASE_COPYRIGHT"
+if [ ! -d "$RELEASE_PROJECT" ]; then
+    printf '錯誤: 找不到專案目錄 %s\n' "$RELEASE_PROJECT" >&2
+    exit 1
+fi
 
-# 顯示 RELEASE_DESCRIPTION 參數，並檢查是否為空或 "null"，如果是則輸出錯誤訊息並退出
-echo "RELEASE_DESCRIPTION=$RELEASE_DESCRIPTION" && ([ -z "$RELEASE_DESCRIPTION" ] || [ "$RELEASE_DESCRIPTION" = "null" ]) && exit 1
+mkdir -p "$OUTPUT_DIR"
 
-echo "=================================================="
+printf '專案目錄=%s\n' "$RELEASE_PROJECT"
+printf '組建配置=%s\n' "$CONFIGURATION"
+printf '版本號=%s\n' "$RELEASE_VERSION"
 
-echo "打包 NUGET 套件"
-
-echo "--------------------------------------------------"
-
-# 組合來源連結
-RELEASE_URL="$GITEA_SERVER_URL/$GITEA_REPOSITORY/src/branch/master"
-
-# 打包 NUGET 套件
-cd $RELEASE_PROJECT && dotnet pack -c "$CONFIGURATION" -o "$WORKSPACE/output" \
+cd "$RELEASE_PROJECT"
+dotnet pack \
+    -c "$CONFIGURATION" \
+    -o "$OUTPUT_DIR" \
     /p:PackageVersion="$RELEASE_VERSION" \
     /p:RepositoryUrl="$RELEASE_URL" \
-    /p:RepositoryType="git" \
+    /p:RepositoryType=git \
     /p:Authors="$RELEASE_AUTHOR" \
     /p:Company="$RELEASE_COMPANY" \
     /p:Copyright="$RELEASE_COPYRIGHT" \
     /p:Description="$RELEASE_DESCRIPTION"
 
-echo "=================================================="
\ No newline at end of file
+section "完成"
+printf '輸出位置=%s\n' "$OUTPUT_DIR"
+separator