Add marketing service to docker-compose configuration

frontend/Dockerfile.marketing

@@ -0,0 +1,24 @@
+# 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"]
+