Upgrade/gatsby 5 - #152

Changed pages include:

• tech-blog/index.html - view
• tech-blog/dev-and-prod-ready-docker-setup-for-spa-app/index.html - view
• tech-blog/async-await-with-express/index.html - view
• tech-blog/aws-cognito-without-library/index.html - view
• tech-blog/complex-command-handler-in-javascript/index.html - view
• tech-blog/cross-system-xdebug-docker-compose-setup/index.html - view
• tech-blog/doctrine-new-dql-operator-and-objects/index.html - view
• tech-blog/elasticsearch-script-unknown-field-source-parser-not-found/index.html - view
• tech-blog/git-not-detecting-renames-quick-workarounds/index.html - view
• tech-blog/git-reverting-branch-removal/index.html - view

There are more changes not included in the list