diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..1256b8c
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,42 @@
+# Git
+.git
+.github
+.gitignore
+
+# Dependencies
+node_modules
+
+# Next.js
+.next
+out
+
+# Environment
+.env*
+!.env.example
+
+# Logs
+*.log
+npm-debug.log*
+logs/
+
+# Documentation
+*.md
+!README.md
+specs/
+
+# IDE
+.vscode
+.idea
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Testing
+.coverage
+.nyc_output
+
+# Misc
+*.swp
+*.swo
+*~
diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..3bbe861
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,6 @@
+# Production site URL (REQUIRED for SEO)
+NEXT_PUBLIC_SITE_URL=https://yourdomain.com
+
+# Environment
+NODE_ENV=production
+PORT=3030
diff --git a/app/blog/[...slug]/page.tsx b/app/blog/[...slug]/page.tsx
index c97fac1..89ad1be 100644
--- a/app/blog/[...slug]/page.tsx
+++ b/app/blog/[...slug]/page.tsx
@@ -76,7 +76,7 @@ export default async function BlogPostPage({ params }: { params: Promise<{ slug:
 
   const relatedPosts = await getRelatedPosts(slugPath)
   const headings = extractHeadings(post.content)
-  const fullUrl = `https://yourdomain.com/blog/${slugPath}`
+  const fullUrl = `${process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3030'}/blog/${slugPath}`
 
   return (
     <>
diff --git a/app/layout.tsx b/app/layout.tsx
index fdef6eb..8875eb8 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -11,7 +11,7 @@ export const metadata: Metadata = {
     default: 'Terminal Blog - Build. Write. Share.',
   },
   description: 'Explorează idei despre dezvoltare, design și tehnologie',
-  metadataBase: new URL('http://localhost:3000'),
+  metadataBase: new URL(process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3030'),
   authors: [{ name: 'Terminal User' }],
   keywords: ['blog', 'dezvoltare web', 'nextjs', 'react', 'typescript', 'terminal'],
   openGraph: {
diff --git a/components/blog/markdown-renderer.tsx b/components/blog/markdown-renderer.tsx
index 78b3d66..07be1ac 100644
--- a/components/blog/markdown-renderer.tsx
+++ b/components/blog/markdown-renderer.tsx
@@ -2,6 +2,7 @@
 
 import ReactMarkdown from 'react-markdown'
 import remarkGfm from 'remark-gfm'
+import rehypeSanitize from 'rehype-sanitize'
 import rehypeRaw from 'rehype-raw'
 import { OptimizedImage } from './OptimizedImage'
 import { CodeBlock } from './code-block'
@@ -17,7 +18,17 @@ export default function MarkdownRenderer({ content, className = '' }: MarkdownRe
     <div className={`prose prose-invert prose-zinc max-w-none ${className}`}>
       <ReactMarkdown
         remarkPlugins={[remarkGfm]}
-        rehypePlugins={[rehypeRaw]}
+        rehypePlugins={[rehypeRaw, [rehypeSanitize, {
+          tagNames: ['p', 'a', 'img', 'code', 'pre', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
+                     'ul', 'ol', 'li', 'blockquote', 'table', 'thead', 'tbody', 'tr', 'th', 'td',
+                     'strong', 'em', 'del', 'br', 'hr', 'div', 'span'],
+          attributes: {
+            a: ['href', 'rel', 'target'],
+            img: ['src', 'alt', 'title', 'width', 'height'],
+            code: ['className'],
+            '*': ['className', 'id']
+          }
+        }]]}
         components={{
           img: ({ node, src, alt, title, ...props }) => {
             if (!src || typeof src !== 'string') return null
diff --git a/components/layout/breadcrumbs-schema.tsx b/components/layout/breadcrumbs-schema.tsx
index 6bfd7b2..171a56a 100644
--- a/components/layout/breadcrumbs-schema.tsx
+++ b/components/layout/breadcrumbs-schema.tsx
@@ -12,7 +12,7 @@ export function BreadcrumbsSchema({ items }: { items: BreadcrumbSchemaItem[] })
       '@type': 'ListItem',
       position: item.position,
       name: item.name,
-      item: `http://localhost:3000${item.item}`,
+      item: `${process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3030'}${item.item}`,
     })),
   }
 
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 6ac4caa..b1c5190 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -59,7 +59,7 @@ services:
     # Docker monitors the application and marks it unhealthy if checks fail
     # If container is unhealthy, restart policy will trigger a restart
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:3030/", "||", "exit", "1"]
+      test: ["CMD-SHELL", "curl -f http://localhost:3030/ || exit 1"]
       interval: 30s        # Check every 30 seconds
       timeout: 10s         # Wait up to 10 seconds for response
       retries: 3           # Mark unhealthy after 3 consecutive failures
diff --git a/lib/markdown.ts b/lib/markdown.ts
index 86674f8..8424557 100644
--- a/lib/markdown.ts
+++ b/lib/markdown.ts
@@ -15,6 +15,15 @@ export function sanitizePath(inputPath: string): string {
   if (normalized.includes('..') || path.isAbsolute(normalized)) {
     throw new Error('Invalid path')
   }
+
+  // CRITICAL: Verify resolved path stays within content directory
+  const resolvedPath = path.resolve(POSTS_PATH, normalized)
+  const allowedBasePath = path.resolve(POSTS_PATH)
+
+  if (!resolvedPath.startsWith(allowedBasePath)) {
+    throw new Error('Path traversal attempt detected')
+  }
+
   return normalized
 }
 
diff --git a/lib/remark-copy-images.ts b/lib/remark-copy-images.ts
index ac701c3..6fc273c 100644
--- a/lib/remark-copy-images.ts
+++ b/lib/remark-copy-images.ts
@@ -39,8 +39,9 @@ async function copyAndRewritePath(node: ImageNode, options: Options): Promise<vo
 
   const sourcePath = path.resolve(contentPostDir, urlWithoutParams)
 
-  if (sourcePath.includes('..') && !sourcePath.startsWith(path.join(process.cwd(), contentDir))) {
-    throw new Error(`Invalid image path: ${node.url} (path traversal detected)`)
+  const allowedBasePath = path.join(process.cwd(), contentDir)
+  if (!sourcePath.startsWith(allowedBasePath)) {
+    throw new Error(`Invalid image path outside content directory: ${node.url}`)
   }
 
   const relativeToContent = path.relative(path.join(process.cwd(), contentDir), sourcePath)
diff --git a/next-env.d.ts b/next-env.d.ts
index c4b7818..9edff1c 100644
--- a/next-env.d.ts
+++ b/next-env.d.ts
@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.d.ts";
+import "./.next/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.