fix(chromium): set PDFENGINES_CONVERT_ENGINES to empty on chromium only variants

build/Dockerfile

@@ -126,6 +126,8 @@ RUN apt-get update -qq \
     && apt-get upgrade -yqq \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends \
         tini \
+        # Many users rely on curl for Docker health checks.
+        curl \
         # Install fonts.
         # Essential metric-compatible fonts for LibreOffice layout fidelity (replaces MS Fonts).
         fonts-crosextra-carlito \
@@ -295,6 +297,8 @@ COPY --link --chown="$GOTENBERG_USER_UID:$GOTENBERG_USER_GID" build/chromium-hyp
 
 ENV CHROMIUM_BIN_PATH=/usr/bin/chromium
 ENV CHROMIUM_HYPHEN_DATA_DIR_PATH=/opt/gotenberg/chromium-hyphen-data
+# No LibreOffice in this variant; override the default to use all available engines.
+ENV PDFENGINES_CONVERT_ENGINES=
 
 USER gotenberg
 WORKDIR /home/gotenberg