Create 2022-08-10-18f-tech-sandwich.md

[lauraGgit]

still needs images

Pull request summary

Creates new blog post

(Optional) Closes #(issue_number). NA

Reminder - please do the following before assigning reviewer

• [ ] update readme
• [ ] For frontend changes, ensure design review

And make sure that automated checks are ok

• fix houndci feedback
• ensure tests pass
• federalist builds
• no new SNYK vulnerabilities are introdcued