Added HockeyStack (closes #366)

CONTRIBUTORS.md

@@ -74,6 +74,7 @@ GitHub:
 - [@evrifaessa](https://github.com/evrifaessa)
 - [@MahbodHastam](https://github.com/MahbodHastam)
 - [@aa1874](https://github.com/aa1874)
+- [@bgrgndzz](https://github.com/bgrgndzz)
 
 Reddit:
 

yaml/degoogle.yml

@@ -415,6 +415,11 @@ web based products:
       eyes: 14
       text: >
         Privacy-focused analytics + web performance monitoring.
+    - name: HockeyStack
+      url: https://www.hockeystack.com/
+      eyes: 5
+      text: >
+        Offers cookieless tracking and no PII collected.
   photos:
     - title: Photos
     - name: Photoprism