Fix: Copy public directory to production container

- Added COPY --from=base /app/public ./public to Dockerfile
- This ensures all public assets (favicon.png, AGB.pdf, assets/) are available in production
- Fixes missing public files in the production container
- Public directory contains favicon.png, AGB.pdf, and logo assets

Dockerfile

@@ -37,6 +37,7 @@ RUN pnpm install --frozen-lockfile --prod
 # Copy built application from base stage
 COPY --from=base /app/dist ./dist
 COPY --from=base /app/server-dist ./server-dist
+COPY --from=base /app/public ./public
 
 # Copy necessary files for runtime
 COPY --from=base /app/src/server/index.ts ./src/server/index.ts