Fix/docker workflow context

[Jwilson1172]

Description

Hopefully the last fix for this problem, adding checkout to the workflow lets me move into the working directory of the repo to preform actions, in addition I'm also using the last version of buildx to avoid any unforeseen problems with the container image

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Change Status

• Complete, tested, ready to review and merge
• Complete, but not tested (may need new tests)
• Incomplete/work-in-progress, PR is for discussion/feedback

Has This Been Tested

• Yes
• No
• Not necessary

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• There are no merge conflicts