Update Dockerfile

Dockerfile

@@ -1,5 +1,7 @@
-# Sharp-maintained runtime with libvips prebuilt (better HEIF success rate)
-FROM ghcr.io/lovell/sharp-node:20
+FROM node:20-bookworm-slim
+
+# Force sharp to ignore any globally-installed libvips (use bundled binaries)
+ENV SHARP_IGNORE_GLOBAL_LIBVIPS=1
 
 RUN apt-get update && apt-get install -y \
   ffmpeg \