feat: Nuxt module for Elastic APM on SSR & CSR

[rwd]

• without elastic-apm-node as a dependency of the app pkg itself, i.e. the ds4ch app here, errors about ES imports were encountered when running the production build; not sure why, but having the dependency on the module pkg alone did not suffice
• adding the --loader arg to the build step is necessary if the Elastic APM Node agent is able to auto-instrument node libraries in such an ES build
• adding the --import arg to the runtime cmd is necessary to start the APM agent running early, before the Nuxt/Nitro app starts importing libraries, so that they actually are instrumented
• to run the production build in Docker with the APM enabled:

  docker run \
    --env-file packages/apps/ds4ch/.env \
    --env NODE_OPTIONS="--import ./server/elastic-apm.server.mjs" \
    -i --rm --name europeana_ds4ch -p 8080:8080 \
    europeana/ds4ch

[github-actions]

JIRA ticket: EC-7573

[sonarqubecloud]

Quality Gate failed

Failed conditions
5.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud