Torch is not found in Dockerfile

Error when building a detectron2 on docker
Hello. Im experiencing a weird behavior where if im building a docker with detectron2 it always showing an error
```
3.930 × python setup.py egg_info did not run successfully.
3.930 │ exit code: 1
3.930 ╰─> [6 lines of output]
3.930 Traceback (most recent call last):
3.930 File "", line 2, in
3.930 File "", line 34, in
3.930 File "/tmp/pip-req-build-sz8hbgh3/setup.py", line 10, in
3.930 import torch
3.930 ModuleNotFoundError: No module named 'torch'
3.930 [end of output]
```
Here is my Dokerfile

```
FROM public.ecr.aws/lambda/python:3.9

# Install Git
RUN yum install -y git

# Copy requirements.txt
COPY requirements.txt ./

# Install the specified packages
RUN pip3 install -r requirements.txt;

COPY sample.py ./
CMD [ "sampl.handler"]
```

Here is my requirements.txt
```
boto3==1.28.62
Pillow==10.0.1
numpy==1.24.3
torch==2.0.0
torchvision==0.15.1
opencv-python==4.6.0.66
git+https://github.com/facebookresearch/detectron2.git

```

Reproduce the Docker build from the shown Dockerfile using requirements.txt, then inspect the dependency installation order around torch and the git-based detectron2 package. The work is done when the image builds successfully without the ModuleNotFoundError for torch.

Written by the indexing model from the issue text.