Restore package-lock.json accidentally removed in #189

[aravind1801-p]

Summary

The package-lock.json file was accidentally deleted in PR #189 (commit 3e5cc26), causing all CI workflows that depend on npm ci to fail.
This PR restores the file from the commit immediately prior (b4838e8) to unblock the CI pipeline.

What happened

• PR Add Blog Post - Centralizing Outbound Traffic with AWS Private NAT Gateway #189 ("Add Blog Post - Centralizing Outbound Traffic with AWS Private NAT Gateway") inadvertently included the deletion of package-lock.json (16,806 lines removed)
• The npm ci command used in both static.yml (Deploy to GitHub Pages) and merge.yml (Publish article) workflows requires package-lock.json to be present
• As a result, all pushes to main after the merge have been failing in CI

Fix

Restored package-lock.json from commit b4838e8 (the last commit on main before the deletion).
No other files are modified — this is a single-file restore.

Local verification

Step	Command	Result
Install dependencies	npm ci	Passed
Build utils	npm run build:utils	Passed
Update posts	npm run posts:update	Passed
Production build	npm run build -- --configuration=production --base-href=/	Passed (105 static routes prerendered)
Dev server	npm start	Passed (http://localhost:4200)

Affected workflows

• static.yml — Deploy static content to GitHub Pages (runs npm ci on push to main)
• merge.yml — Publish article (runs npm ci on push to main)

Checklist:

• I am added to the list of authors correctly.
• All images used in the post is in the correct folder (assets/images/post/).
• My article has been reviewed internally before opening this Pull Request.
• I have not modified someone else's previously published articles.
• I double checked my changes locally at http://127.0.0.1:4000/ after running bundle install && bundle exec jekyll serve.
• My changes generate no new errors