Add marketing service to docker-compose configuration

frontend/Caddyfile.marketing

@@ -0,0 +1,21 @@
+:8020 {
+    # Enable compression
+    encode gzip zstd
+    
+    # Set root to built files
+    root * /usr/share/caddy
+    
+    # Authenticated app served under /app (if needed in future)
+    handle_path /app* {
+        uri strip_prefix /app
+        try_files {path} /index.html
+        file_server
+    }
+    
+    # Marketing site is the public default
+    handle {
+        try_files {path} /marketing.html
+        file_server
+    }
+}
+

frontend/Dockerfile.marketing

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+# Marketing Site Dockerfile
+# Builds and serves the marketing website in a container
+FROM node:18-alpine AS builder
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy source code
+COPY . .
+
+# Build marketing site
+RUN npm run build:marketing
+
+# Stage 2: Serve with Caddy
+FROM caddy:latest
+COPY --from=builder /app/dist /usr/share/caddy
+COPY Caddyfile.marketing /etc/caddy/Caddyfile
+EXPOSE 8020
+CMD ["caddy", "run", "--config", "/etc/caddy/Caddyfile"]
+