updated header, added makefile, updated tflabs

content/newsroom/mainnet_upgrade_complete/index.md

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-id: mainnet_upgrade_complete
-title: 🎉 Mainnet Upgrade - Complete! 
-image_caption: Mainnet Upgrade Complete
-description: We’re pleased to share that the mainnet upgrade to TF Grid v3.7.1 is complete!
-date: 2022-10-20
-taxonomies:
-    people: [sam_taggart]
-    tags: [update, technology, news]
-    news-category: [foundation]
-extra:
-    imgPath: mainnet_upgrade_complete.png
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-
-We’re pleased to share that the mainnet upgrade to TF Grid v3.7.1 is complete, related issues have been resolved, and everything is stable. Have fun! And remember the [Grid Testers Chat](https://bit.ly/threefoldtesting).
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-<br/>
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-Many thanks to all involved in the work done on this version and the upgrade itself. Rockstars.