feat(frontend): add subscriptions #149

Job	Run time
docker-build / Build Docker image	1m 1s
warmup-cache / warmup-cache	39s
formatter / check-format	8s
translations / check-translations	8s
audit / audit	8s
types / check-types	8s
build / build	7s
linting / check-linting	7s
coverage / coverage-test	8s
	2m 34s

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