Adding a few more things - repository button not showing?

_config.yml

@@ -41,4 +41,20 @@ html:
 sphinx:
   config:
     html_theme_options:
-      search_bar_text: "Search..."
+      search_bar_text: "Search..."
+
+parse:
+  myst_enable_extensions:  # default extensions to enable in the myst parser. See https://myst-parser.readthedocs.io/en/latest/using/syntax-optional.html
+    # - amsmath
+    - colon_fence
+    # - deflist
+    - dollarmath
+    # - html_admonition
+    # - html_image
+    - linkify
+    # - replacements
+    # - smartquotes
+    - substitution
+    - tasklist
+  myst_url_schemes: [mailto, http, https] # URI schemes that will be recognised as external URLs in Markdown links
+  myst_dmath_double_inline: true  # Allow display math ($$) within an inline context