fix: install CPU-only torch via Dockerfile, fix requirements syntax

Dockerfile

@@ -17,6 +17,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc \
     && rm -rf /var/lib/apt/lists/*
 
+# Install CPU-only PyTorch first (avoids downloading 2GB GPU build)
+RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu
+
 # Install requirements
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt

requirements.txt

@@ -15,7 +15,7 @@ opencv-python-headless==4.8.1.78
 # ── ML / NLP ───────────────────────────────────────────────────────────────────
 numpy==1.26.4                  # Fix for version 2.0 compatibility issues
 Pillow==11.3.0
-torch>=2.2.2 --index-url https://download.pytorch.org/whl/cpu
+torch>=2.2.2
 transformers>=4.40.0          # HuggingFace Transformers (BERT, DeBERTa, FLAN-T5)
 sentencepiece>=0.1.99         # Required for T5Tokenizer
 accelerate>=0.27.0