fix(ci): copy exported frontend assets into image roots

Author: jaytaylor

Dockerfile

@@ -74,7 +74,7 @@ RUN mkdir -p /app /data /var/log/supervisor
 # separate dist dir so `next build` doesn't clobber a live dev server's `.next`
 # artifacts.
 COPY --from=backend /app/target/release/cxdb-server /app/cxdb
-COPY --from=frontend /app/.next-build /usr/share/nginx/html
+COPY --from=frontend /app/.next-build/. /usr/share/nginx/html/
 
 # Copy nginx config
 COPY deploy/nginx.conf /etc/nginx/nginx.conf

gateway/Dockerfile

@@ -37,7 +37,7 @@ RUN go mod download
 COPY gateway/ ./
 
 # Copy frontend build output for embedding
-COPY --from=frontend /app/.next-build ./pkg/proxy/web/
+COPY --from=frontend /app/.next-build/. ./pkg/proxy/web/
 
 # Build with CGO enabled for SQLite
 RUN --mount=type=cache,target=/root/.cache/go-build \