Feat/frontend container health probe

[Aharshi3614]

What this does

Adds a healthcheck to the frontend service in docker-compose.yml.

Related Issue

Closes #315

Why this matters

The backend already had a healthcheck configured, but the frontend container
had none. Without a health probe, Docker has no way to know if the frontend
build is actually serving content or silently failing.

Change

Added healthcheck to the frontend service using wget to probe the Nginx
server on port 80:

• interval: 30s — checks every 30 seconds
• timeout: 10s — fails if no response within 10 seconds
• retries: 3 — marks unhealthy after 3 consecutive failures
• start_period: 10s — gives container 10s to start before checks begin

Why wget instead of curl?

The frontend uses an Nginx Alpine image which includes wget by default
but may not have curl installed — keeping it consistent with the base image

[imDarshanGK]

Thanks for the PR. The intent (adding a frontend container health probe) is clear, but the current changes don’t match the scope.

Issues found:

• Changes in db_service.py are unrelated to frontend health checks and include a significant refactor of DB connection handling
• docker-compose.yml healthcheck is not clearly tied to the frontend service
• The PR includes backend test changes that are unrelated to the stated goal

Could you please:

• revert unrelated backend DB changes
• add a proper frontend healthcheck (e.g. container /health endpoint or HTTP check on frontend service)
• keep the PR focused strictly on frontend container health probe

Once scoped correctly, I can review and merge

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[Aharshi3614]

Cleaned up the PR — reverted all unrelated backend DB changes and removed the test file. The PR now contains only the frontend healthcheck in docker-compose.yml:

-healthcheck uses wget (available in Nginx Alpine by default)
-probes http://localhost:80 every 30s
-10s timeout, 3 retries, 10s start period
-frontend depends_on backend with condition: service_healthy

[imDarshanGK]

@Aharshi3614 Please properly scope the healthcheck to the frontend service and ensure it correctly verifies frontend availability before re-requesting review.

[Aharshi3614]

Hi @imDarshanGK! Updated the healthcheck to use CMD-SHELL with explicit || exit 1 to properly verify frontend Nginx availability. The check is now strictly scoped to the frontend service on port 80.