Add hacktoberfest

Author: asyraffff

README.md

@@ -452,6 +452,7 @@ Hey friend! Help me out for a couple of ☕️
 - [Choosealicense.com](https://github.com/github/choosealicense.com) - A site to provide non-judgmental guidance on choosing a license for your open source project 🔥 ✅ 🚀
 - [best-practices-badge](https://github.com/coreinfrastructure/best-practices-badge) - 🏆 Core Infrastructure Initiative Best Practices Badge 🔥 ✅
 - [git_curate](https://github.com/matt-harvey/git_curate) - ✂️ Peruse and delete git branches ergonomically 🔥 ✅
+- [hacktoberfest](https://github.com/digitalocean/hacktoberfest) - Hacktoberfest - App to manage the annual open-source challenge, used for the 2019 & 2020 seasons. 🔥 ✅ 🚀
 - [git_time_extractor](https://github.com/rietta/git_time_extractor) - Analyzes Git repository commit logs to compute developer working hours, weekly activity, and to detect death marches in software development. 👴 ✅
 - [heaven](https://github.com/atmos/heaven) - 🚶 Rails app for GitHub Flow 👴 ✅
 - [pull-request-roulette](https://github.com/davearonson/pull-request-roulette) - Site to match up developers with people willing to comment on their pull requests 👴 🚀