* feat(backend): moved http metrics into assist handlers file
* fix(assist): use correct value for requests_duration metric
* feat(assist): removed unnecessary imports
* fix(assist): fixed typo in repond method
* fix(assist): added metrics.js to clean script
* feat(assist): try to save http method asap in server logic
* feat(assist): final version
* feat(assist): removed prom-client from peers and sourcemap-reader
* feat(sourcemap-reader): added missing package-lock.json
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