diff --git a/.gitignore b/.gitignore
index e2a6c162..92ef2a64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,9 +5,12 @@
 Documents/
 mariadb/data/
 n8n*/
+n8n-postgres/
 npm/
 phpmyadmin/
 pgadmin/
+.tmp.driveupload
+.qsync
 # =====================================================
 # IDE/Editor settings
 # =====================================================
diff --git a/backend/Dockerfile copy b/backend/.backup/Dockerfile copy
similarity index 100%
rename from backend/Dockerfile copy
rename to backend/.backup/Dockerfile copy
diff --git a/backend/Dockerfile.build b/backend/.backup/Dockerfile.build
similarity index 100%
rename from backend/Dockerfile.build
rename to backend/.backup/Dockerfile.build
diff --git a/backend/Dockerfile.dev b/backend/.backup/Dockerfile.dev
similarity index 100%
rename from backend/Dockerfile.dev
rename to backend/.backup/Dockerfile.dev
diff --git a/backend/.backup/backend build.md b/backend/.backup/backend build.md
new file mode 100644
index 00000000..d67f618e
--- /dev/null
+++ b/backend/.backup/backend build.md	
@@ -0,0 +1,29 @@
+# Backend build
+
+## วิธีสร้าง package-lock.json ด้วย Docker
+
+### 1. เช็ค uid:gid ของโฟลเดอร์โปรเจกต์บน QNAP
+
+stat -c "%u:%g" .
+
+### 2. ใช้ค่าที่ได้มาแทน UID:GID
+
+```bash
+docker run --rm \
+  -v "/share/Container/dms/frontend:/app" -w /app \
+  --user UID:GID -e HOME=/tmp \
+  node:20-alpine sh -lc 'mkdir -p /tmp && npm install --package-lock-only --ignore-scripts'
+```
+
+สร้าง package-lock.json โดย ไม่ติดตั้ง node_modules
+
+--user $(id -u):$(id -g) ทำให้ไฟล์ที่ได้เป็นเจ้าของโดยยูสเซอร์ปัจจุบัน (กันปัญหา root-owned)
+
+## ขั้นตอน Build บน QNAP
+
+docker compose -f docker-backend-build.yml build --no-cache 2>&1 | tee backend_build.log
+
+## สำหรับ build local
+
+cd backend
+docker build -t dms-backend:dev --target dev .
diff --git a/backend/backend_tree.txt b/backend/.backup/backend_tree.txt
old mode 100755
new mode 100644
similarity index 100%
rename from backend/backend_tree.txt
rename to backend/.backup/backend_tree.txt
diff --git a/backend/ed25519 b/backend/.backup/ed25519
similarity index 100%
rename from backend/ed25519
rename to backend/.backup/ed25519
diff --git a/backend/ed25519.pub b/backend/.backup/ed25519.pub
similarity index 100%
rename from backend/ed25519.pub
rename to backend/.backup/ed25519.pub
diff --git a/backend/fix-bearer-index.patch.diff b/backend/.backup/fix-bearer-index.patch.diff
similarity index 100%
rename from backend/fix-bearer-index.patch.diff
rename to backend/.backup/fix-bearer-index.patch.diff
diff --git a/backend/.dockerignore b/backend/.dockerignore
index 8f61cf2f..4133e0fe 100644
--- a/backend/.dockerignore
+++ b/backend/.dockerignore
@@ -1,8 +1,11 @@
 .git
+.vscode
+.backup
 node_modules
 logs
 *.log
-Dockerfile*
+Dockerfile*.*
+*.yml
 README*.md
 coverage
 tmp
diff --git a/backend/.eslintrc.json b/backend/.eslintrc.json
new file mode 100644
index 00000000..26441a93
--- /dev/null
+++ b/backend/.eslintrc.json
@@ -0,0 +1,15 @@
+{
+  "env": {
+    "node": true,
+    "es2021": true,
+    "jest": true
+  },
+  "extends": ["eslint:recommended", "plugin:prettier/recommended"],
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "rules": {
+    "prettier/prettier": "warn"
+  }
+}
diff --git a/backend/.prettierrc.json b/backend/.prettierrc.json
new file mode 100644
index 00000000..8b4d1e23
--- /dev/null
+++ b/backend/.prettierrc.json
@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "arrowParens": "always",
+  "printWidth": 80
+}
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 4a178dd3..ed942ade 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -66,4 +66,5 @@ USER node
 EXPOSE 3001
 HEALTHCHECK --interval=30s --timeout=5s --retries=10 \
   CMD wget -qO- http://127.0.0.1:3001/health || exit 1
-CMD ["node","src/index.js"]
\ No newline at end of file
+CMD ["node","src/index.js"]
+
diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
index 0165ccdd..a529977a 100755
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -51,7 +51,7 @@ services:
       JWT_EXPIRES_IN: "12h"
       PASSWORD_SALT_ROUNDS: "10"
       FRONTEND_ORIGIN: "https://lcbp3.np-dms.work"
-      CORS_ORIGINS: "https://lcbp3.np-dms.work,http://localhost:3000,http://127.0.0.1:3000"
+      CORS_ORIGINS: "https://backend.np-dms.work,http://localhost:3000,http://127.0.0.1:3000,https://lcbp3.np-dms.work"
       COOKIE_DOMAIN: ".np-dms.work"
       RATE_LIMIT_WINDOW_MS: "900000"
       RATE_LIMIT_MAX: "200"
diff --git a/backend/package.json b/backend/package.json
index 5e4ade07..f0a1455a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dms-backend",
-  "version": "0.6.0",
+  "version": "0.8.0",
   "private": true,
   "type": "module",
   "main": "src/index.js",
@@ -11,7 +11,12 @@
     "dev": "nodemon --watch src src/index.js",
     "dev:desktop": "node --watch src/index.js",
     "start": "node src/index.js",
-    "lint": "echo 'lint placeholder'",
+    "lint": "eslint . --ext .js",
+    "lint:fix": "eslint . --ext .js --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
+    "test:watch:coverage": "jest --watch --coverage",
     "health": "node -e \"fetch('http://localhost:'+ (process.env.BACKEND_PORT||3001) +'/health').then(r=>r.text()).then(console.log).catch(e=>{console.error(e);process.exit(1)})\"",
     "postinstall": "node -e \"console.log('Installed dms-backend %s','0.6.0')\""
   },
@@ -33,6 +38,12 @@
     "winston": "^3.13.0"
   },
   "devDependencies": {
-    "nodemon": "^3.1.10"
+    "nodemon": "^3.1.10",
+    "eslint": "^8.56.0",
+    "prettier": "^3.1.0",
+    "eslint-config-prettier": "^9.0.0",
+    "eslint-plugin-prettier": "^5.0.0",
+    "jest": "^29.7.0",
+    "supertest": "^6.3.4"
   }
 }
diff --git a/backend/package_v0_5_0..json b/backend/package_v0_5_0..json
deleted file mode 100644
index 5b2fcbf6..00000000
--- a/backend/package_v0_5_0..json
+++ /dev/null
@@ -1,25 +0,0 @@
-
-{
-  "name": "dms-backend",
-  "version": "0.5.0",
-  "private": true,
-  "type": "module",
-  "scripts": {
-    "dev": "node --env-file=../.env src/index.js",
-    "start": "node src/index.js",
-    "health": "node -e \"fetch('http://localhost:'+ (process.env.BACKEND_PORT||3001) +'/health').then(r=>r.text()).then(console.log).catch(e=>{console.error(e);process.exit(1)})\""
-  },
-  "dependencies": {
-    "bcrypt": "5.1.1",
-    "cors": "2.8.5",
-    "dotenv": "16.4.5",
-    "express": "4.19.2",
-    "express-rate-limit": "7.4.0",
-    "helmet": "7.1.0",
-    "jsonwebtoken": "9.0.2",
-    "mariadb": "3.3.1",
-    "morgan": "1.10.0",
-    "sequelize": "6.37.3"
-  }
-}
-
diff --git a/backend/package_v0_6_0.json b/backend/package_v0_6_0.json
deleted file mode 100644
index 902851e6..00000000
--- a/backend/package_v0_6_0.json
+++ /dev/null
@@ -1,38 +0,0 @@
-{
-  "name": "dms-backend",
-  "version": "0.6.0",
-  "private": true,
-  "type": "module",
-  "main": "src/index.js",
-  "engines": {
-    "node": ">=20.0.0"
-  },
-  "scripts": {
-    "dev": "nodemon --watch src src/index.js",
-    "start": "node src/index.js",
-    "lint": "echo 'lint placeholder'",
-    "health": "node -e \"fetch('http://localhost:'+ (process.env.BACKEND_PORT||3001) +'/health').then(r=>r.text()).then(console.log).catch(e=>{console.error(e);process.exit(1)})\"",
-    "postinstall": "node -e \"console.log('Installed dms-backend %s','0.6.0')\""
-  },
-
-  "dependencies": {
-    "bcrypt": "5.1.1",
-    "bcryptjs": "^2.4.3",
-    "cookie-parser": "^1.4.7",
-    "cors": "2.8.5",
-    "dotenv": "16.4.5",
-    "express": "^4.21.2",
-    "express-rate-limit": "7.4.0",
-    "helmet": "7.1.0",
-    "jsonwebtoken": "9.0.2",
-    "mariadb": "3.3.1",
-    "morgan": "^1.10.1",
-    "multer": "^2.0.2",
-    "mysql2": "^3.11.0",
-    "sequelize": "6.37.3",
-    "winston": "^3.13.0"
-  },
-  "devDependencies": {
-    "nodemon": "^3.1.10"
-  }
-}
diff --git a/backend/tests/health.test.js b/backend/tests/health.test.js
new file mode 100644
index 00000000..586c78f0
--- /dev/null
+++ b/backend/tests/health.test.js
@@ -0,0 +1,15 @@
+import app from "../src/index.js"; // สมมติว่าคุณ export app จาก src/index.js
+import request from "supertest";
+
+// ปิด server หลังจากเทสเสร็จ
+afterAll((done) => {
+  app.server.close(done);
+});
+
+describe("GET /health", () => {
+  it("should respond with 200 OK and a health message", async () => {
+    const response = await request(app).get("/health");
+    expect(response.statusCode).toBe(200);
+    expect(response.text).toContain("Backend is healthy");
+  });
+});
diff --git a/docker-backend-build.yml b/docker-backend-build.yml
index 4be9dfe2..13a18769 100644
--- a/docker-backend-build.yml
+++ b/docker-backend-build.yml
@@ -16,8 +16,8 @@ services:
       target: prod
     image: dms-backend:prod
     command: ["true"]
-# docker compose -f docker-backend-build.yml build --no-cache
+# docker compose -f docker-backend-build.yml build --no-cache 2>&1 | tee backend_build.log
 # ***** สำหรับ build บน server เอา ## ออก *****
 # สำหรับ build บน local
 # cd backend
-# docker build -t dms-backend:dev --target dev .
\ No newline at end of file
+# docker build -t dms-backend:dev --target dev .