Update Dockerfile

Dockerfile

@@ -8,19 +8,22 @@ ENV PATH="/home/user/.local/bin:$PATH"
 # Set working directory
 WORKDIR /app
 
-# Upgrade pip and install requirements cleanly
+# Upgrade pip and install requirements
 COPY --chown=user backend/requirements.txt ./requirements.txt
+
+# Force clean, fixed installs
 RUN pip install --upgrade pip && \
     pip uninstall -y transformers peft || true && \
     pip install --no-cache-dir -r requirements.txt && \
-    pip install --no-cache-dir "transformers>=4.30.0" "peft>=0.5.0"
+    pip install --no-cache-dir \
+        transformers==4.31.0 \
+        peft==0.5.0
 
-# Copy the full project code (backend and data)
+# Copy project code
 COPY --chown=user . .
 
-# Expose default FastAPI port
+# Expose FastAPI port
 EXPOSE 7860
 
-# Run FastAPI app
+# Start app
 CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "7860"]
-