Update Dockerfile

Dockerfile

@@ -32,7 +32,7 @@ COPY requirements.txt .
 RUN python -m pip install --no-cache-dir --upgrade pip \
  && python -m pip install --no-cache-dir -r requirements.txt
 
-RUN python -c "import torch; print(f'PyTorch version during build: {torch.__version__}'); print(f'Has get_default_device: {hasattr(torch, \'get_default_device\')}')"
+RUN python -c "import torch; print('PyTorch version during build: ' + torch.__version__); print('Has get_default_device: ' + str(hasattr(torch, 'get_default_device')))"
 
 # Copy the application code into the container
 COPY mdr_pdf_parser.py .