add relative url to all links in script

.ci/generateIndex.py

@@ -20,6 +20,9 @@ def build_link(title, href):
     elif ('handbook-annexes' in href):
         href = href.replace('handbook-annexes', 'handbook').strip()
 
+    # add relative url
+    href = "{{ '" + href + "' | relative_url }}"
+
     return f'\t\t\t<li><a href="{href}">{title}</a></li>\n'
 
 def build_section_start(title, shortcut):
@@ -198,8 +201,8 @@ for s in sections:
 index += "\n</div>"
 
 ## add link to return to main index
-index += "<br><center><a href='/'>go back</a></center>"
-index += "<br><center><a href='/cards'>Overview of all HowTo cards</a></center>"
+index += """<br><center><a href="{{ '/' | relative_url }}">go back</a></center>"""
+index += """<br><center><a href="{{ '/cards' | relative_url }}">Overview of all HowTo cards</a></center>"""
 
 # output the index
 #print(index)