diff --git a/.dockerignore b/.dockerignore
index da67572..027a87a 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -4,9 +4,9 @@ npm-debug.log
 .gitignore
 README.md
 .env
+.env.*
 .nyc_output
 coverage
-.nyc_output
 .vscode
 .DS_Store
 dist
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index f65703a..a66b656 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Multi-stage build for production
-FROM node:18-alpine AS build-stage
+FROM node:20-alpine AS build-stage
 
 # Set working directory
 WORKDIR /app
@@ -8,7 +8,8 @@ WORKDIR /app
 COPY package*.json ./
 
 # Install dependencies
-RUN npm ci
+#ENV NODE_ENV=production
+RUN npm ci --no-audit --no-fund
 
 # Copy source code
 COPY . .
@@ -29,4 +30,5 @@ COPY nginx.conf /etc/nginx/nginx.conf
 EXPOSE 80
 
 # Start nginx
+HEALTHCHECK --interval=30s --timeout=3s --retries=3 CMD wget -qO- http://localhost/healthz >/dev/null 2>&1 || exit 1
 CMD ["nginx", "-g", "daemon off;"]
\ No newline at end of file
diff --git a/nginx.conf b/nginx.conf
index ad8b806..e6e5c8a 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -5,22 +5,45 @@ events {
 http {
     include       /etc/nginx/mime.types;
     default_type  application/octet-stream;
+    sendfile on;
+    etag on;
+    gzip on;
+    gzip_comp_level 5;
+    gzip_min_length 1024;
+    gzip_types
+        text/plain text/css application/json application/javascript
+        text/xml application/xml application/xml+rss image/svg+xml;
     
     server {
         listen 80;
-        server_name localhost;
+        server_name _;
         root /usr/share/nginx/html;
         index index.html;
+
+        add_header X-Content-Type-Options "nosniff" always;
+        add_header X-Frame-Options "DENY" always;
+        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
         
         # Handle client-side routing
         location / {
             try_files $uri $uri/ /index.html;
         }
+
+        location = /index.html {
+            add_header Cache-Contrl "no-store, no-cache, must-revalidate";
+            expires -1;
+        }
         
         # Cache static assets
         location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
             expires 1y;
             add_header Cache-Control "public, immutable";
         }
+
+        location = healthz {
+            default_type text/plain;
+            return 200 'ok';
+        }
     }
 }
\ No newline at end of file
diff --git a/src/components/UserLogin.vue b/src/components/UserLogin.vue
index 4fc12c8..e2b2573 100644
--- a/src/components/UserLogin.vue
+++ b/src/components/UserLogin.vue
@@ -113,7 +113,7 @@
         </div>
 
         <div class="signup-prompt">
-          <p>Don't have an account? <a href="/signup" class="signup-link">Sign up</a></p>
+          <p>Don't have an account? <router-link to="/signup" class="signup-link">Sign up</router-link></p>
         </div>
       </div>
     </div>
diff --git a/src/components/UserSignup.vue b/src/components/UserSignup.vue
index bb7f18e..a58f755 100644
--- a/src/components/UserSignup.vue
+++ b/src/components/UserSignup.vue
@@ -84,6 +84,7 @@
                 :class="{ 'error': error && !email }"
                 placeholder="Enter your email"
                 required 
+                autocomplete="email"
               />
             </div>
           </div>
@@ -100,6 +101,7 @@
                 :class="{ 'error': error && !password }"
                 placeholder="Create a password"
                 required 
+                autocomplete="new-password"
               />
               <button 
                 type="button" 
@@ -135,6 +137,7 @@
                 :class="{ 'error': error && !confirmPassword || passwordMismatch }"
                 placeholder="Confirm your password"
                 required 
+                autocomplete="new-password"
               />
               <button 
                 type="button" 
@@ -210,7 +213,7 @@
         </div>
 
         <div class="login-prompt">
-          <p>Already have an account? <a href="/login" class="login-link">Sign in</a></p>
+          <p>Already have an account? <router-link to="/login" class="login-link">Sign In</router-link></p>
         </div>
       </div>
     </div>
@@ -277,6 +280,7 @@ export default {
       }
     },
     isFormValid() {
+      const emailOk = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(this.email);
       return this.firstName && 
              this.lastName && 
              this.username && 
diff --git a/vue.config.js b/vue.config.js
index 51a265b..fe6e24f 100644
--- a/vue.config.js
+++ b/vue.config.js
@@ -1,5 +1,5 @@
 const { defineConfig } = require('@vue/cli-service')
 module.exports = defineConfig({
   transpileDependencies: true,
-  lintOnSave: true
+  lintOnSave: process.env.NODE_ENV !== 'production'
 })