Docker Health Check and Node.js Application - node.js

Question

I've been trying to include healthcheck to my container, however, no matter what i do, container never seems to work. To be precise, i have the following structure:
Traefik Proxy
Node.js Application behind that proxy
All the labels for Traefik are included in the docker-compose.yml file.
Whenever i try to add healthcheck, either in Dockerfile or in docker-compose.yml, application is built and listening for connections on port 443, however, when i try to access address from the browser, it always shows 404 error (when Traefik is unable to proxy container).
Here is simple service configuration:
frontend:
restart: always
build:
context: ./configuration/frontend
dockerfile: Dockerfile
environment:
- application_environment=development
- FRONTEND_DOMAIN=HOST_HERE
volumes:
- ./volumes/frontend:/app:rw
- ./volumes/backend/.env:/.env:ro
- ./volumes/backend/resources/lang:/backend-lang:rw
labels:
- traefik.enable=true
- traefik.frontend.rule=Host:HOST_HERE
- traefik.port=3000
- traefik.docker.network=traefik_proxy
- traefik.frontend.redirect.entryPoint=https
- traefik.frontend.passHostHeader=true
- traefik.frontend.headers.SSLRedirect=true
- traefik.frontend.headers.browserXSSFilter=true
- traefik.frontend.headers.contentTypeNosniff=true
- traefik.frontend.headers.customFrameOptionsValue=SAMEORIGIN
- traefik.frontend.headers.STSPreload=true
- traefik.frontend.headers.STSSeconds=31536000
healthcheck:
test: ["CMD", "cd /app && yarn healthcheck"]
interval: 10s
timeout: 5s
start_period: 60s
networks:
- traefik_proxy
And here is healthcheck.js file which is accessible through the command yarn healthcheck:
const http = require('https');
const options = {
host: process.env.FRONTEND_DOMAIN,
port: 443,
path: '/',
method: 'GET',
timeout: 2000
};
const healthCheck = http.request(options, (response) => {
console.log(`STATUS: ${response.statusCode}`);
if (response.statusCode === 200) {
process.exit(0);
}
else {
process.exit(1);
}
});
healthCheck.on('error', function (error) {
console.error('ERROR', error);
process.exit(1);
});
healthCheck.end();
When I start the container without the HEALTHCHECK options (either Dockerfile or compose), it works just fine, page is displayed and when I manually execute yarn healthcheck, then it shows that everything is fine (I mean in the console, STATUS: 200). However, with automated healthcheck, Traefik will have no access to the container.