customer.json 'NoneType' object has no attribute 'group'

[gilesdowner]

Checklist

• I have read the README and know the correct effect of the functional design.
• There are no similar reports on existing issues (including closed ones).
• I found the bug on the latest code of the master branch.

Describe the bug

When using custom config through the Docker image

 docker run -v "$(pwd):/home/nonroot/workdir" brootware/pyredactkit input-file.log -c custom.json

I get this error

\______   \___.__. \______   \ ____   __| _/____    _____/  |_  |    |/ _|__|/  |_ 
 |     ___<   |  |  |       _// __ \ / __ |\__  \ _/ ___\   __\ |      < |  \   __\
 |    |    \___  |  |    |   \  ___// /_/ | / __ \\  \___|  |   |    |  \|  ||  |  
 |____|    / ____|  |____|_  /\___  >____ |(____  /\___  >__|   |____|__ \__||__|  
           \/              \/     \/     \/     \/     \/               \/                                                                                                                 
                    +-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+-+
                    |P|o|w|e|r|e|d| |b|y| |B|r|o|o|t|w|a|r|e|
                    +-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+-+
            
    https://github.com/brootware
    https://brootware.github.io     
    https://twitter.com/brootware                                                                        
    
[+] Processing starts now. This may take some time depending on the file size. Monitor the redacted file size to monitor progress
[+] custom.json file supplied, will be redacting all supplied custom regex patterns
Traceback (most recent call last):
  File "/usr/local/bin/prk", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.9/site-packages/pyredactkit/runner.py", line 157, in main
    execute_redact_logic()
  File "/usr/local/lib/python3.9/site-packages/pyredactkit/runner.py", line 146, in execute_redact_logic
    custom_redact.process_custom_file(file, args.customfile)
  File "/usr/local/lib/python3.9/site-packages/pyredactkit/custom_redactor.py", line 120, in process_custom_file
    data = self.redact_custom(line, customfile)
  File "/usr/local/lib/python3.9/site-packages/pyredactkit/custom_redactor.py", line 65, in redact_custom
    pattern_string = pattern_string.group(0)
AttributeError: 'NoneType' object has no attribute 'group'

To Reproduce

Steps to reproduce the behavior:

1. Go to WSL Ubuntu
2. make sure docker is installed
3. grab the custom.json from this repo
4. run docker run -v "$(pwd):/home/nonroot/workdir" brootware/pyredactkit input-file.log -c custom.json
5. See error

Expected behavior

it shouldn't break and the log should be redacted

Screenshots

Software

• Python version: by running: python --version
• pip version: by running: pip --version
• Power shell version: by running: $PSVersionTable.PSVersion

Desktop

• MacOS: [e.g. macOS 10.15.6] by running: sw_vers -productVersion
• Windows: by running: Get-ComputerInfo | select WindowsProductName, WindowsVersion, OsHardwareAbstractionLayer
• Terminal or Power-shell:

Additional context