Copy built embed assets into Docker images (#4084)

The embed widget is built to public/embed/ (which is .gitignored) but
only public/build/ was copied from the node build stage. This caused
/embed/lychee-embed.js to fall through to Laravel routing instead of
being served as a static file.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: cdzombak

Dockerfile

@@ -115,6 +115,7 @@ COPY --from=composer --chown=www-data:www-data /app/vendor ./vendor
 
 # Copy built frontend assets from node stage
 COPY --from=node --chown=www-data:www-data /app/public/build ./public/build
+COPY --from=node --chown=www-data:www-data /app/public/embed ./public/embed
 
 # Ensure storage and bootstrap/cache are writable with minimal permissions
 RUN mkdir -p storage/framework/cache \

Dockerfile-legacy

@@ -134,6 +134,7 @@ COPY --from=composer --chown=www-data:www-data /app/vendor ./vendor
 
 # Copy built frontend assets from node stage
 COPY --from=node --chown=www-data:www-data /app/public/build ./public/build
+COPY --from=node --chown=www-data:www-data /app/public/embed ./public/embed
 
 # Ensure storage and bootstrap/cache are writable with minimal permissions
 RUN mkdir -p storage/framework/cache \