* add dev mechanism for making backend unavailable
* handle unavailable backend in html
* fix ordering of /-/ routes
* Add new loader to index.html
* tweak light colours
* fix readme
* add error handling and error state
* use setTimeout for the retry loop
* easier on the comments:
* FrontendService: Add tracing and logging middleware
* tests!
* middleware tests
* context middleware test
* revert http_server back to previous version
* fix lint
* fix test
* use http.NotFound instead of custom http handler
* use existing tracer for package
* use otel/trace.Tracer in request_tracing middleware
* tidy up tracing in contextMiddleware
* fix 404 test
* remove spans from contextMiddleware
* comment
* rename /mtfe route to /femt to match project name
* set correct navTree JSON property name
* call GetWebAssets in the request handler to prevent stale assets during development
* Call /bootdata and render grafana
* set nonce on script
* write csp header in index handler
* write report-only csp as well
* debug stuff
* more debug logging
* move importing app into a seperate, async-loaded module
* Clean up comments
* make /femt redirect to / in the frontend
* remove console.log
* remove stale commented code
* call __grafana_load_failed if bootstrap fails
* comment for __grafana_boot_data_promise
* remove console.log
* remove blank newline
* codeowners
