Running git-clerk on a sub-path

[silvester-pari]

There are currently two issues preventing git-clerk to run on a sub-path (e.g. https://mywebsite.com/git-clerk/):

• base path: the built app has base path of / and therefore the assets and the config are not found -> is there a way to set base path on runtime? Or do we need to build a docker image for each deployment?
• since the PR number etc. are taken from the route (e.g. /${session.number}) the navigation/API calls do not work -> would it maybe be better to use query params for this? or filter out the base path from the routs...