Add Docker to Railstats LA Technologies

[palak-hellowrld]

Fixes #8658

What changes did you make?

• Added "Docker" to the technologies list in _projects/metro-ontime.md

Why did you make the changes (we will use this info to test)?

• The Railstats LA project uses Docker but it wasn't listed on the project's page, so this keeps the site's tech info accurate for visitors

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Screenshots of Proposed Changes To The Website (if any, please do not include screenshots of code changes)

Visuals before changes are applied

No before screenshot (forgot to save the screenshot). The technologies field simply did not include Docker yet.

Visuals after changes are applied

[github-actions]

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From your project repository, check out a new branch and test the changes.

git checkout -b palak-hellowrld-add-docker-tech-8658 gh-pages
git pull https://github.com/palak-hellowrld/website.git add-docker-tech-8658

[Abigail-Diaz]

Review ETA: 8/14
Availability: 10-2PM PST

[kimberly-WY]

Good improvement overall. One edge case: empty string vs null aren't treated the same downstream — might need a normalization step.

[Abigail-Diaz]

Hello @palak-hellowrld,

Everything looks good.

• Linked issue is present
• No errors during local testing
• Visual changes are consistent with the requirements in the original issue
• Branches are correctly set

Great job! :)

[palak-hellowrld]

One edge case: empty string vs null aren't treated the same downstream — might need a normalization step.

Thanks for the review @kimberly-WY ! Just want to clarify, my change only added 'Docker' to the technologies list in the front matter. Could you point me to where the empty string/null concern applies here? Want to make sure I address the right thing.