Update Dockerfile

Dockerfile

@@ -1,5 +1,5 @@
-# ---- Dockerfile ----
-FROM python:3.9-slim
+# Use Python 3.9 on Debian slim (runs as root by default)
+FROM python:3.9-slim-bookworm
 
 # --- Environment ---
 ENV PYTHONDONTWRITEBYTECODE=1 \
@@ -7,30 +7,33 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     STREAMLIT_HOME=/tmp/.streamlit \
     HOME=/tmp
 
+# Create Streamlit config directory (owned by root, writable by root)
 RUN mkdir -p $STREAMLIT_HOME
 
-# --- System deps for conversions ---
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    pandoc \
-    unoconv \
-    libreoffice-core \
-    ffmpeg \
-    libmagic1 \
+# --- System dependencies for conversion libraries ---
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+      pandoc \                                # for pypandoc conversions :contentReference[oaicite:2]{index=2}
+      unoconv \                               # headless LibreOffice converter :contentReference[oaicite:3]{index=3}
+      libreoffice-core \                      # LibreOffice engine for unoconv :contentReference[oaicite:4]{index=4}
+      ffmpeg \                                # audio/video processing :contentReference[oaicite:5]{index=5}
+      libmagic1 \                             # magic library for python-magic :contentReference[oaicite:6]{index=6}
  && rm -rf /var/lib/apt/lists/*
 
-# --- Python deps ---
+# --- Python dependencies ---
 RUN pip install --no-cache-dir \
-    streamlit==1.45.1 \
-    pillow \
-    pypandoc \
-    ffmpeg-python \
-    python-magic
+    streamlit==1.45.1 \                      # Streamlit with event-loop fix :contentReference[oaicite:7]{index=7}
+    pillow \                                 # image conversions :contentReference[oaicite:8]{index=8}
+    pypandoc \                               # text/markup conversions :contentReference[oaicite:9]{index=9}
+    ffmpeg-python \                          # wrapper for ffmpeg :contentReference[oaicite:10]{index=10}
+    python-magic                           # MIME detection :contentReference[oaicite:11]{index=11}
 
-# --- App code ---
+# --- Copy application code ---
 COPY app.py /app/app.py
 WORKDIR /app
 
-# --- Expose & run ---
-EXPOSE 7860
+# --- Expose Streamlit port for Spaces (7860) ---
+EXPOSE 7860                                # Hugging Face Spaces default :contentReference[oaicite:12]{index=12}
 
+# --- Launch the Streamlit app as root ---
 CMD ["streamlit", "run", "app.py"]