add: basic obsidian mode

README.md

@@ -16,6 +16,17 @@ The arguments supported include:
 
 - --git-repo the URL of the git repo to load
 - --listen address to listen on, in the form of 0.0.0.0:8080
+- --obsidian-mode pre-processes markdown files to make them more standard compliant
 
 Additionally, if there is a './template.html' file in the repo, is will be used to wrap
 the generated HTML. Specifically, the 'body' block will be replaced by the markdown content.
+
+## Obsidian mode
+
+Intended to create compatibility with Obsidian, because it has a fancy UI.
+Specifically, this replaces `[[thing]]` with `[thing](thing.md)`
+None of the other options in https://help.obsidian.md/obsidian-flavored-markdown are included.
+
+## Future work
+
+Replace the Obisdian markdown with https://crates.io/crates/obsidian-export.