Add npm publish script

Added publish script with console logs, and added script to shellcheck CI job.

Closes #1 (closed)

src/npm-publish.sh

+#!/bin/bash -e
+
+echo "Setting publish config for scope '@$CI_PROJECT_ROOT_NAMESPACE', project id '$CI_PROJECT_ID'"
+npm config set "@$CI_PROJECT_ROOT_NAMESPACE:registry" "$CI_SERVER_URL/api/v4/packages/npm"
+npm config set "//$CI_SERVER_HOST/api/v4/packages/npm/:_authToken" "$CI_JOB_TOKEN"
+npm config set "//$CI_SERVER_HOST/api/v4/projects/$CI_PROJECT_ID/packages/npm/:_authToken" "$CI_JOB_TOKEN"
+
+echo "Publishing package '@$CI_PROJECT_ROOT_NAMESPACE/$CI_PROJECT_NAME' to internal package registry"
+npm publish
+
+echo "Done!"