Update Dockerfile

Dockerfile

@@ -1,13 +1,13 @@
 # Dockerfile
 FROM python:3.10-slim-bookworm AS builder
 
-# Install system dependencies (execstack is available in Bookworm)
+# Install system dependencies, including patchelf (available in default repos)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc \
     g++ \
     ffmpeg \
     libsndfile1 \
-    execstack \
+    patchelf \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
@@ -19,14 +19,14 @@ COPY requirements.txt .
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt
 
-# Clear the executable stack flag on ctranslate2 shared libraries
+# Clear the executable stack flag on ctranslate2 shared libraries using patchelf
 # This resolves the "cannot enable executable stack" error at import time
-RUN find /usr/local/lib -name "libctranslate2*.so*" -exec execstack -c {} \; || true
+RUN find /usr/local/lib -name "libctranslate2*.so*" -exec patchelf --clear-execstack {} \; || true
 
 # Final stage
 FROM python:3.10-slim-bookworm
 
-# Install runtime system dependencies (ffmpeg required for audio conversion)
+# Install runtime system dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
     libsndfile1 \