fix: Update theme source link, add local dev cmd

Author: manid2

README.md

@@ -6,4 +6,12 @@ A simple Hugo theme for terminal users.
 This was initially based on [panr/terminal][1] theme but has deviated
 significantly and deserves to be a new theme.
 
+Local development
+-----------------
+
+```bash
+HUGO_MODULE_REPLACEMENTS="github.com/manid2/hugo-xterm -> ../.." \
+hugo server --source exampleSite
+```
+
 [1]: https://github.com/panr/hugo-theme-terminal

layouts/partials/footer.html

@@ -1,4 +1,4 @@
-{{- $gitRepoUrl := printf "https://%s.com/%s/%s/" site.Data.gitinfo.host site.Data.gitinfo.user site.Data.gitinfo.repo -}}
+{{- $gitRepoUrl := "https://github.com/manid2/hugo-xterm/" -}}
 
 {{- /* site build info */}}
 <p class="buildinfo">