AWS Security Hub Transformer failed via docker image

[tracker5676]

Hi team,

According to Tenable instructions for syncing Tenable Vuln Management with AWS Security Hub, I should install the AWS Security Hub Transformer.
https://docs.tenable.com/integrations/AWS/Content/SecurityHub.htm
There are two options:

To build the Docker image, run the following script:
docker build -t tio2sechub:latest .

To install python requirements, run the following script:
pip install -r requirements.txt

Once I try to set it via docker build I get an error.

[+] Building 0.1s (1/1) FINISHED docker:default
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 2B 0.0s
ERROR: failed to solve: failed to read dockerfile: open Dockerfile: no such file or directory

Please let me know where to get Dockefile to build an image.