This is the part of Osmose-QA that shows issues on a map.
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The HTML/JS part is in Vue.js. You can run de development instance locally using the public Osmose-QA Frontend API. The dev-server and dev-server-public have browser hot code reload. dev-server need a local API server, while dev-server-public use the API of osmose.openstreetmap.fr.
cd web
npm install --dev
npm run dev-server-public
Then go to http://localhost:8081/
To run Osmose Frontend API Server, preferably use Docker. Follow the documentation in the docker directory. You can also install the Frontend manually by following the install guide.