docs: add copyright information to docs (DSP-1190) (#65)

* add copyright and repository information to docs

* add current year to copyright information

Author: irinaschubert

mkdocs.yml

@@ -1,4 +1,10 @@
 site_name: DSP-TOOLS
+site_url: https://dasch-swiss.github.io/dsp-tools/
+repo_url: https://github.com/dasch-swiss/dsp-tools
+repo_name: dasch-swiss/dsp-tools
+edit_uri: blob/main/docs/
+copyright: "&copy; 2017 - <script>document.write(new Date().getFullYear())</script> <a href='https://dasch.swiss' target='_blank'>Data and Service Center for the Humanities (DaSCH)</a>"
+
 
 nav:
     - Overview: index.md