Fix: main:app -> app:app (renamed main.py to app.py)

Dockerfile

@@ -6,12 +6,6 @@
 FROM python:3.11-slim
 
 # ── System dependencies ───────────────────────────────────
-# ffmpeg        → pydub audio decode (webm/ogg/mp3 → wav)
-# libsndfile1   → soundfile (WAV/FLAC fallback)
-# libgl1-mesa-glx + libglib2.0-0 → EasyOCR / OpenCV headless
-# libgomp1      → PyTorch multi-threaded CPU ops
-# git           → HF model downloads via git-lfs if needed
-# curl          → health-check probes / HF API calls
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
     libsndfile1 \
@@ -25,8 +19,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # ── Create non-root user (HF Spaces requirement) ─────────
 RUN useradd -m -u 1000 appuser
 
-# ── Set working directory ─────────────────────────────────
-WORKDIR /app
+# ── Set working directory inside user home ────────────────
+# MUST be under /home/appuser — fixes "No module named main"
+WORKDIR /home/appuser/app
 
 # ── Copy requirements first (layer cache) ────────────────
 COPY requirements.txt .
@@ -41,27 +36,26 @@ COPY --chown=appuser:appuser . .
 # ── Environment defaults (overridden by HF Secrets) ──────
 ENV PORT=7860
 ENV PYTHONUNBUFFERED=1
-ENV HF_HOME=/app/.cache/huggingface
+ENV HF_HOME=/home/appuser/.cache/huggingface
 
 # ── Switch to non-root user ───────────────────────────────
 USER appuser
 
-# ── Expose port ───────────────────────────────────────────
 EXPOSE 7860
 
-# ── Healthcheck ───────────────────────────────────────────
 HEALTHCHECK --interval=60s --timeout=10s --start-period=120s --retries=3 \
     CMD curl -f http://localhost:7860/ || exit 1
 
-# ── Start server ──────────────────────────────────────────
-# 1 worker only — models are loaded once at startup (global state).
-# 600s timeout handles audio+image (Whisper large-v3 ≈ 2-3 min on CPU).
+# --worker-tmp-dir /tmp  → fixes "Permission denied" on gunicorn control socket
+# --chdir               → ensures main.py is found at cwd
 CMD ["gunicorn", \
      "--bind", "0.0.0.0:7860", \
      "--workers", "1", \
      "--timeout", "600", \
      "--keep-alive", "5", \
+     "--worker-tmp-dir", "/tmp", \
+     "--chdir", "/home/appuser/app", \
      "--log-level", "info", \
      "--access-logfile", "-", \
      "--error-logfile", "-", \
-     "main:app"]
+     "app:app"]