fix: dockerfile librairies again

Dockerfile

@@ -1,36 +1,75 @@
-FROM python:3.10-slim
+# ─────────────────────────────────────────────────────────────────────────────
+#  SAMPLE GENERATOR  —  Dockerfile
+#  Flask + Meta MusicGen (audiocraft)
+#  Compatible with: HuggingFace Spaces (Docker SDK), Render, local Docker
+# ────────────────────────────────────────────── ───────────────────────────────
 
-WORKDIR /app
+FROM python:3.11-slim
 
-# ── System dependencies ───────────────────────────────────────────────────────
+# ── System deps ───────────────────────────────────────────────────────────────
+# ffmpeg   → audio encoding/decoding used by torchaudio & audiocraft
+# libsndfile1 → soundfile I/O backend
+# git      → audiocraft may pull sub-packages from git at install time
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    git \
-    ffmpeg \
-    build-essential \
-    pkg-config \
-    libavformat-dev \
-    libavcodec-dev \
-    libswscale-dev \
+        ffmpeg \
+        libavformat-dev \
+        libavcodec-dev \
+        libavdevice-dev \
+        libavutil-dev \
+        libavfilter-dev \
+        libswscale-dev \
+        libswresample-dev \
+        libsndfile1 \
+        git \
+        pkg-config \
     && rm -rf /var/lib/apt/lists/*
 
-# ── Python: torch first (CPU build, works on Render's free/standard tier) ─────
-# Swap the index URL for a CUDA build if you ever add a GPU service on Render.
+# ── Create a non-root user (required by HuggingFace Spaces) ──────────────────
+RUN useradd -m -u 1000 appuser
+
+WORKDIR /app
+
+# ── Install PyTorch (CPU-only) first, before audiocraft pulls its own copy ───
+# Using the official CPU wheel index keeps the image ~2 GB smaller than CUDA.
 RUN pip install --no-cache-dir \
-    torch torchaudio --index-url https://download.pytorch.org/whl/cpu
+        torch==2.1.0 \
+        torchaudio==2.1.0 \
+        --index-url https://download.pytorch.org/whl/cpu
 
-# ── Python: audiocraft + flask ────────────────────────────────────────────────
-RUN pip install --upgrade pip \
-    && pip install --no-cache-dir audiocraft flask
+# ── Stub out xformers ─────────────────────────────────────────────────────────
+# xformers has no CPU-only pre-built wheel and fails to compile from source
+# (it needs CUDA). audiocraft lists it as a dependency but MusicGen inference
+# works fine without it on CPU. We install a minimal stub so pip's resolver
+# sees the requirement as satisfied and skips the source build entirely.
+RUN mkdir -p /tmp/xformers-stub && \
+    echo "from setuptools import setup; setup(name='xformers', version='0.0.28.post1')" \
+        > /tmp/xformers-stub/setup.py && \
+    pip install --no-cache-dir /tmp/xformers-stub
 
-# ── App code ──────────────────────────────────────────────────────────────────
+# ── Install remaining Python deps ─────────────────────────────────────────────
+# --extra-index-url ensures pip can still find CPU wheels for any torch-related
+# packages pulled in transitively by audiocraft, preventing it from silently
+# upgrading torch to a CUDA build from the default PyPI index.
+COPY requirements.txt .
+RUN pip install --no-cache-dir \
+        --extra-index-url https://download.pytorch.org/whl/cpu \
+        -r requirements.txt
+
+# ── Copy application source ───────────────────────────────────────────────────
 COPY app.py index.html ./
 
-# ── Model cache directory (matches the Render persistent disk mount path) ─────
-# The disk is mounted at /data; HF will read/write models there so they
-# survive container restarts and don't need to re-download every deploy.
-ENV HF_HOME=/data/huggingface
+# ── Runtime environment ───────────────────────────────────────────────────────
+# HF_HOME: store downloaded model weights in a predictable location.
+# On Render, mount a persistent disk at /data to avoid re-downloading on restart.
+ENV HF_HOME=/data/huggingface \
+    PORT=7860
+
+# Ensure the cache dir is writable by the non-root user even when /data is
+# not mounted (e.g. plain `docker run` without a volume).
+RUN mkdir -p /data/huggingface && chown -R appuser:appuser /data /app
+
+USER appuser
 
-# Render injects $PORT at runtime; default to 10000 to match Render's standard
-EXPOSE 10000
+EXPOSE 7860
 
-CMD ["python", "app.py"]
+CMD ["python", "app.py"]