Filter with Tags within a Collection

Developer help
1

And

  • How was Ghost installed and configured? Via Docker and Hub image
  • What Node version, database, OS & browser are you using? as Defined in the Docker
  • What errors or information do you see in the console? None
  • What steps could someone else take to reproduce the issue you’re having? Use Tags as Filter for Posts within a Collection Template

I’m searching for a solution to use Tags as a second Navigation within the Collection Page:

First Navigation: Home - Collection - About - Contact
Second Navigation in BLOG Collection Only:
Content Marketing. Getting Started Ghost
→ Those Tags should be used to filter the Posts related to them.

My routes.yaml looks like this:

routes:
  /subscribe/: members/subscribe
  /signup/: members/signup
  /signin/: members/signin
  /account/: members/account
  /:
    data: page.home
    template: home

collections:
  /blog/:
    permalink: /blog/{slug}/
    template: collection

taxonomies:
  tag: /tag/{slug}/
  author: /author/{slug}/

Any hints / tips how i can get this? This site you can see is just my development environment…

Thanks!