diff --git a/src/app.js b/src/app.js
index 6ebb5aa..4dd3bec 100644
--- a/src/app.js
+++ b/src/app.js
@@ -111,7 +111,7 @@ app.get('/', (req, res) => {
 });
 
 // Error handler
-app.use((err, req, res, next) => {
+app.use((err, req, res, _next) => {
   console.error('💥 Error:', err);
   res.status(500).json({ error: err.message });
 });
@@ -136,4 +136,4 @@ if (require.main === module) {
   });
 }
 
-module.exports = app;
\ No newline at end of file
+module.exports = app;
diff --git a/src/middleware/logger.js b/src/middleware/logger.js
index 9d3b339..7d1d6e0 100644
--- a/src/middleware/logger.js
+++ b/src/middleware/logger.js
@@ -15,7 +15,7 @@ function logger(req, res, next) {
 
   // Override res.end to capture response time and status
   const originalEnd = res.end;
-  res.end = function (chunk, encoding) {
+  res.end = function(chunk, encoding) {
     const responseTime = Date.now() - startTime;
 
     // Record response time histogram
@@ -40,4 +40,4 @@ function logger(req, res, next) {
   next();
 }
 
-module.exports = logger;
\ No newline at end of file
+module.exports = logger;
diff --git a/src/public/app.js b/src/public/app.js
index c6dcec5..e647e41 100644
--- a/src/public/app.js
+++ b/src/public/app.js
@@ -220,7 +220,7 @@ class MonitoringDashboard {
     const container = document.getElementById('api-metrics');
 
     const requestCounters = data.counters.filter(c => c.name === 'http_requests_total');
-    const responseCounters = data.counters.filter(c => c.name === 'http_responses_total');
+    // const _responseCounters = data.counters.filter(c => c.name === 'http_responses_total');
     const durationHistograms = data.histograms.filter(h => h.name === 'http_request_duration_ms');
 
     let html = '<div class="metrics-grid">';
@@ -303,7 +303,7 @@ class MonitoringDashboard {
 
   updateStatus(status, text) {
     const indicator = document.getElementById('status-indicator');
-    const dot = document.getElementById('status-dot');
+    // const _dot = document.getElementById('status-dot');
     const statusText = document.getElementById('status-text');
 
     indicator.className = `status-indicator ${status}`;
@@ -367,6 +367,7 @@ class MonitoringDashboard {
 }
 
 // Global functions for buttons
+// eslint-disable-next-line no-unused-vars
 async function refreshData() {
   const dashboard = window.dashboard;
   if (dashboard) {
@@ -374,6 +375,7 @@ async function refreshData() {
   }
 }
 
+// eslint-disable-next-line no-unused-vars
 async function testAPI() {
   try {
     const response = await fetch('/api/test');
@@ -392,6 +394,7 @@ async function testAPI() {
   }
 }
 
+// eslint-disable-next-line no-unused-vars
 async function downloadMetrics() {
   try {
     const response = await fetch('/api/metrics');
@@ -419,4 +422,4 @@ async function downloadMetrics() {
 // Initialize dashboard when page loads
 document.addEventListener('DOMContentLoaded', () => {
   window.dashboard = new MonitoringDashboard();
-});
\ No newline at end of file
+});
diff --git a/src/routes/api.js b/src/routes/api.js
index 9050081..af8d472 100644
--- a/src/routes/api.js
+++ b/src/routes/api.js
@@ -136,4 +136,4 @@ router.get('/test', (req, res) => {
   });
 });
 
-module.exports = router;
\ No newline at end of file
+module.exports = router;
diff --git a/src/routes/health.js b/src/routes/health.js
index 1032326..ec8e974 100644
--- a/src/routes/health.js
+++ b/src/routes/health.js
@@ -90,4 +90,4 @@ router.get('/live', (req, res) => {
   });
 });
 
-module.exports = router;
\ No newline at end of file
+module.exports = router;
diff --git a/src/utils/metrics.js b/src/utils/metrics.js
index 1140bf0..a6a0a2d 100644
--- a/src/utils/metrics.js
+++ b/src/utils/metrics.js
@@ -92,4 +92,4 @@ module.exports = {
   recordHistogram,
   getMetrics,
   resetMetrics
-};
\ No newline at end of file
+};
diff --git a/tests/api.tests.js b/tests/api.tests.js
index fde2ecd..46398cb 100644
--- a/tests/api.tests.js
+++ b/tests/api.tests.js
@@ -3,7 +3,7 @@ const app = require('../src/app');
 
 describe('API Endpoints', () => {
   describe('GET /api/system', () => {
-    it('should return system information', async () => {
+    it('should return system information', async() => {
       const response = await request(app)
         .get('/api/system')
         .expect(200);
@@ -18,7 +18,7 @@ describe('API Endpoints', () => {
   });
 
   describe('GET /api/memory', () => {
-    it('should return memory information', async () => {
+    it('should return memory information', async() => {
       const response = await request(app)
         .get('/api/memory')
         .expect(200);
@@ -33,7 +33,7 @@ describe('API Endpoints', () => {
   });
 
   describe('GET /api/process', () => {
-    it('should return process information', async () => {
+    it('should return process information', async() => {
       const response = await request(app)
         .get('/api/process')
         .expect(200);
@@ -47,7 +47,7 @@ describe('API Endpoints', () => {
   });
 
   describe('GET /api/metrics', () => {
-    it('should return application metrics', async () => {
+    it('should return application metrics', async() => {
       const response = await request(app)
         .get('/api/metrics')
         .expect(200);
@@ -62,7 +62,7 @@ describe('API Endpoints', () => {
   });
 
   describe('GET /api/test', () => {
-    it('should return test response', async () => {
+    it('should return test response', async() => {
       const response = await request(app)
         .get('/api/test')
         .expect(200);
@@ -75,7 +75,7 @@ describe('API Endpoints', () => {
   });
 
   describe('Error handling', () => {
-    it('should return 404 for unknown API endpoints', async () => {
+    it('should return 404 for unknown API endpoints', async() => {
       const response = await request(app)
         .get('/api/nonexistent')
         .expect(404);
@@ -84,4 +84,4 @@ describe('API Endpoints', () => {
       expect(response.body.error).toBe('Not Found');
     });
   });
-});
\ No newline at end of file
+});
diff --git a/tests/health.tests.js b/tests/health.tests.js
index 640c188..c597d80 100644
--- a/tests/health.tests.js
+++ b/tests/health.tests.js
@@ -3,7 +3,7 @@ const app = require('../src/app');
 
 describe('Health Check Endpoints', () => {
   describe('GET /health', () => {
-    it('should return basic health status', async () => {
+    it('should return basic health status', async() => {
       const response = await request(app)
         .get('/health')
         .expect(200);
@@ -17,7 +17,7 @@ describe('Health Check Endpoints', () => {
   });
 
   describe('GET /health/detailed', () => {
-    it('should return detailed health information', async () => {
+    it('should return detailed health information', async() => {
       const response = await request(app)
         .get('/health/detailed')
         .expect(200);
@@ -49,7 +49,7 @@ describe('Health Check Endpoints', () => {
       expect(response.body.loadAverage).toHaveLength(3);
     });
 
-    it('should include version information', async () => {
+    it('should include version information', async() => {
       const response = await request(app)
         .get('/health/detailed')
         .expect(200);
@@ -59,7 +59,7 @@ describe('Health Check Endpoints', () => {
   });
 
   describe('GET /health/ready', () => {
-    it('should return readiness status', async () => {
+    it('should return readiness status', async() => {
       const response = await request(app)
         .get('/health/ready')
         .expect(200);
@@ -70,7 +70,7 @@ describe('Health Check Endpoints', () => {
   });
 
   describe('GET /health/live', () => {
-    it('should return liveness status', async () => {
+    it('should return liveness status', async() => {
       const response = await request(app)
         .get('/health/live')
         .expect(200);
@@ -83,7 +83,7 @@ describe('Health Check Endpoints', () => {
   });
 
   describe('Health status validation', () => {
-    it('should return valid timestamp format', async () => {
+    it('should return valid timestamp format', async() => {
       const response = await request(app)
         .get('/health')
         .expect(200);
@@ -93,11 +93,11 @@ describe('Health Check Endpoints', () => {
       expect(timestamp.getTime()).not.toBeNaN();
     });
 
-    it('should return consistent service name across endpoints', async () => {
+    it('should return consistent service name across endpoints', async() => {
       const basicHealth = await request(app).get('/health');
       const detailedHealth = await request(app).get('/health/detailed');
 
       expect(basicHealth.body.service).toBe(detailedHealth.body.service);
     });
   });
-});
\ No newline at end of file
+});