Update Dockerfile

Dockerfile

@@ -12,30 +12,55 @@ WORKDIR /app
 # Copy the requirements file into the container at /app
 COPY requirements.txt /app/
 
-# Install build dependencies
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends \
-        llvm \
-        clang \
-        build-essential \
-        libedit-dev \
-        libffi-dev \
-        python3-dev \
-        libgl1-mesa-glx \
-        libsm6 \
-        libxrender1 \
-        libglib2.0-0 \
-        ffmpeg \
-        libsndfile1 \
-        libsndfile1-dev \
-        && rm -rf /var/lib/apt/lists/*
-
-# Set LLVM_CONFIG before building llvmlite (if needed)
-# For numba 0.48.0 and llvmlite 0.31.0, often llvm-config-8 or llvm-config-9 is relevant.
-# Python 3.9 is newer, so you might need to ensure a compatible LLVM is installed.
-# Let's try to be specific for older LLVM needed by llvmlite 0.31.0
-RUN apt-get update && apt-get install -y llvm-9-dev && rm -rf /var/lib/apt/lists/*
+# --- START LLVM INSTALLATION FIX ---
+# Add Debian's oldstable repository to ensure access to llvm-9-dev if it's considered "older"
+# for the default slim image's sources.
+# This ensures we can find packages that might not be in the primary/current stable sources.
+# It's important to use the correct release name for oldstable (e.g., bullseye, buster).
+# For Python 3.9-slim (Debian 11 Bullseye), bullseye is the current stable, so llvm-9-dev should be there.
+# Let's ensure the regular apt sources are exhaustive.
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    lsb-release \
+    wget \
+    gnupg2 \
+    software-properties-common \
+    && rm -rf /var/lib/apt/lists/*
+
+# Add LLVM's official APT repository for a wider range of LLVM versions
+# This is generally more reliable for specific LLVM versions.
+RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
+RUN echo "deb http://apt.llvm.org/bullseye/ llvm-toolchain-bullseye-9 main" >> /etc/apt/sources.list.d/llvm.list \
+    && echo "deb-src http://apt.llvm.org/bullseye/ llvm-toolchain-bullseye-9 main" >> /etc/apt/sources.list.d/llvm.list
+
+# Update apt cache again to include the new LLVM repository
+RUN apt-get update
+
+# Install specific LLVM 9 development packages
+RUN apt-get install -y --no-install-recommends \
+    llvm-9-dev \
+    llvm-9 \
+    llvm-9-runtime \
+    clang-9 \
+    # Ensure standard build tools and audio libs are present
+    build-essential \
+    libedit-dev \
+    libffi-dev \
+    python3-dev \
+    libgl1-mesa-glx \
+    libsm6 \
+    libxrender1 \
+    libglib2.0-0 \
+    ffmpeg \
+    libsndfile1 \
+    libsndfile1-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set LLVM_CONFIG to the specific version's config script
+# This is crucial for llvmlite to find the correct LLVM installation
 ENV LLVM_CONFIG=/usr/bin/llvm-config-9
+# --- END LLVM INSTALLATION FIX ---
+
 
 # Explicitly install compatible versions of core audio/Numba stack
 # Order matters: numpy -> llvmlite -> numba -> resampy -> librosa