update Calcom image version and add QOL Env Var for public signup and Email SMTP

[M4dhav]

What is this PR about?

This PR Updates the Image version for the Calcom template, adds the necessary relevant changes to the compose and exposes a Quality of Life Env Var to enable or disable public signup and add SMTP details to send booking emails on the self-hosted instance.

Checklist

Before submitting this PR, please make sure that:

• I have read the suggestions in the README.md file https://github.com/Dokploy/templates?tab=readme-ov-file#general-requirements-when-creating-a-template
• I have tested the template in my instance, so the maintainers don't spend time trying to figure out what's wrong.
• I have added tests that demonstrate that my correction works or that my new feature works.

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Name	Status	Preview	Last Commit
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[Siumauricio]

Tested this on a Dokploy instance (imported the PR's blueprints/calcom as-is, fresh volumes). Works. I pushed one small commit to your branch (0fafe1f) — details below.

Image / version

• calcom/cal.com:v6.2.0 is the latest upstream release (2026-03-01) and the latest tag on Docker Hub; manifest → 200. Big jump from v2.7.6, so the added DATABASE_DIRECT_URL / DATABASE_HOST are needed (matches calcom/docker .env.example).

New env vars — all exist upstream:

• NEXT_PUBLIC_DISABLE_SIGNUP (.env.example line ~280). Defaulting it to true is fine because v6.x has the first-run wizard at /auth/setup when the DB has no users (verified below), so the admin still gets created without public signup.
• EMAIL_SERVER_HOST/PORT/USER/PASSWORD, EMAIL_FROM (.env.example lines 222-243). Empty defaults are safe: packages/lib/serverConfig.ts only builds an SMTP transport when EMAIL_SERVER_HOST is non-empty and falls back to sendmail otherwise (same behaviour as before this PR).
• ALLOWED_HOSTNAMES="${CALCOM_HOST}": the literal quotes are intentional — Cal.com does JSON.parse([${ALLOWED_HOSTNAMES}]), so the value must be a quoted string.

Deploy evidence (~340 s incl. image pull, Next.js 16.1.5, Ready in 2.2s)

• calcom-1 running healthy, RestartCount 0; postgres-1 running; migrations + app seeding ran on first start.
• Through Traefik: / → 307 /auth/login → 307 /auth/setup?step=1 → 200 «Setup | Cal.com» (first-admin wizard, no users yet). /signup → 307 /auth/error?error=Signup+is+disabled+in+this+instance — so DISABLE_SIGNUP=true is honoured at runtime. /api/auth/csrf → 200.
• Validators (generate-meta.js --check, validate-docker-compose.ts, validate-template.ts) pass.

Pushed to your branch (0fafe1f)

• meta.json version was still v2.7.6 → bumped to v6.2.0 so the catalogue shows the right version.
• The ARM comment said "line 16" but the image is on line 19 after the header comments were added.

LGTM.