diff --git a/.eslintrc.json b/.eslintrc.json
index 85ef0ab..30be6b6 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -6,15 +6,22 @@
     "sourceType": "module",
     "project": "tsconfig.json"
   },
-  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:jest/recommended"
+  ],
   "env": {
     "node": true,
     "jest/globals": true
   },
+  "plugins": ["jest", "@typescript-eslint"],
   "rules": {
-    //'no-console': 'off',
-    //'import/prefer-default-export': 'off',
-    "@typescript-eslint/no-unused-vars": "warn"
+    //"no-console": "off",
+    //"import/prefer-default-export": "off",
+    //"@typescript-eslint/no-unused-vars": "warn"
+    "jest/no-conditional-expect": "off"    
   },
-  "ignorePatterns": ["dist"]
+  "ignorePatterns": ["dist", "jest.config.js"]
+
 }
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 016b1ae..a464e73 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,5 +18,9 @@ jobs:
     - uses: actions/checkout@v3
     - run: npm ci
     - run: npm run build:prod --if-present
-    - run: npm start
+    - name: Start server
+      run: |
+        npm start &
+        sleep 5 # Give server some time to start
+ 
     - run: npm test
diff --git a/src/app.test.ts b/src/app.test.ts
index 836d785..0682f2d 100644
--- a/src/app.test.ts
+++ b/src/app.test.ts
@@ -2,7 +2,7 @@ import axios from 'axios';
 
 describe('Server Status', () => {
   it('The server is running', async () => {
-    var serverStatus;
+    let serverStatus;
     try {
       const response = await axios.get('http://localhost');
       serverStatus = response.status;
diff --git a/src/controller/write.ts b/src/controller/write.ts
index 458fe4a..b62fd57 100644
--- a/src/controller/write.ts
+++ b/src/controller/write.ts
@@ -10,7 +10,7 @@ function errorChecking (req:Request, res:Response, next:NextFunction) {
     const errorAsString = new Error(JSON.stringify(errorAsJson));
     const hasKeyErrors =  errors.array().some(error => error.msg.includes("Key"));
    
-    res.status(hasKeyErrors ? 403 : 422); // send forbidden or 
+    res.status(hasKeyErrors ? 403 : 422); // send forbidden or unprocessable content
     return next(errorAsString);
   }
 
@@ -23,7 +23,7 @@ function errorChecking (req:Request, res:Response, next:NextFunction) {
     
     //entry.create(req, res);
     //const test = process.env.TEST;
-    res.send(req.query);
+   // res.send(req.query);
   
 }
 
diff --git a/src/error.ts b/src/error.ts
index 086caff..0b0bc04 100644
--- a/src/error.ts
+++ b/src/error.ts
@@ -1,6 +1,4 @@
 import { Request, Response, NextFunction } from "express";
-import logger from '@src/scripts/logger';
-
 
 export function notFound(req: Request, res: Response, next: NextFunction) {
   res.status(404);
@@ -11,11 +9,14 @@ export function notFound(req: Request, res: Response, next: NextFunction) {
 export function handler(err: Error,  req: Request, res: Response<Response.Error>, next: NextFunction) {
   const statusCode = res.statusCode !== 200 ? res.statusCode : 500;
   res.status(statusCode);
-	let message = err.message;
+	
+  let message;
 	try {
-    let jsonMessage = JSON.parse(message);
+    const jsonMessage = JSON.parse(err.message);
     message = jsonMessage;
-  } catch (e) {}
+  } catch (e) {
+    message = err.message;
+  }
 	
   const responseBody = {
 		status: statusCode,
diff --git a/src/scripts/crypt.ts b/src/scripts/crypt.ts
index 6be4dce..b14ef42 100644
--- a/src/scripts/crypt.ts
+++ b/src/scripts/crypt.ts
@@ -1,5 +1,9 @@
-const crypto = require('crypto');
+import * as crypto from 'crypto';
 
-export const crypt = function (value:string) { 
-	return crypto.createHmac('sha256', process.env.KEYA).update(value).digest("base64");
+export const crypt = function (value:string) {
+	const key = process.env.KEYA;
+	if (!key) {
+			throw new Error('KEYA is not defined in the environment variables');
+	}
+	return crypto.createHmac('sha256', key).update(value).digest("base64");
 };
\ No newline at end of file