Files
multica/.env.example
Bohan Jiang a23856bae3 MUL-1624 docs(email): clarify 888888 is opt-in; document SMTP option (#2666)
* docs(email): clarify 888888 is opt-in via MULTICA_DEV_VERIFICATION_CODE; document SMTP option in self-host docs

The startup log line, .env.example, and SELF_HOSTING_ADVANCED.md still
implied that the dev master code 888888 is auto-active whenever
APP_ENV != "production". That has not been true since the master code
was gated behind MULTICA_DEV_VERIFICATION_CODE — the fixed code is
disabled by default and must be opted in explicitly.

Also extend the docs site with the SMTP relay backend added in #1877:
auth-setup, environment-variables, and self-host-quickstart now cover
both Resend and SMTP options in EN and ZH.

Co-authored-by: multica-agent <github@multica.ai>

* docs(email): treat SMTP as an email backend in self-host docs and startup warning

Address review feedback on #2666:

- server: startup warning now fires only when both RESEND_API_KEY and SMTP_HOST
  are empty, since either one is a valid email backend. Otherwise the log
  mis-tells SMTP-only operators that verification codes go to stdout.
- self-host-quickstart (EN/ZH): tell readers to fetch the verification code
  from whichever backend they configured (Resend or SMTP); fall back to
  stdout only when neither is configured.
- auth-setup (EN/ZH): \"without Resend\" → \"without any email backend
  configured\" so the wording stays correct now that SMTP is a first-class
  option.

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: multica-agent <github@multica.ai>
2026-05-15 14:18:46 +08:00

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# Database
POSTGRES_DB=multica
POSTGRES_USER=multica
POSTGRES_PASSWORD=multica
POSTGRES_PORT=5432
DATABASE_URL=postgres://multica:multica@localhost:5432/multica?sslmode=disable
# Optional pgxpool tuning. Defaults are 25 / 5 per pod and are usually fine.
# You can also set pool_max_conns / pool_min_conns as query params on
# DATABASE_URL; env vars below take precedence over URL params.
# DATABASE_MAX_CONNS=25
# DATABASE_MIN_CONNS=5
# Server
# APP_ENV gates production safety checks. Docker self-host pins APP_ENV to
# "production" by default. Local dev can leave it unset.
# See SELF_HOSTING.md for the full login setup.
APP_ENV=
# Optional local/testing shortcut. Empty by default, so there is no fixed
# verification code. Without RESEND_API_KEY, generated codes print to stdout.
# If you need deterministic local automation, set a 6-digit value such as
# 888888 and keep APP_ENV non-production. This is ignored when APP_ENV=production.
MULTICA_DEV_VERIFICATION_CODE=
PORT=8080
# Prometheus metrics are disabled by default. When enabled, bind to loopback
# unless you protect the listener with private networking, allowlists, or
# proxy auth. Do not expose this endpoint through the public app/API ingress.
# HTTP request metrics start accumulating only when this listener is enabled.
# METRICS_ADDR=127.0.0.1:9090
JWT_SECRET=change-me-in-production
MULTICA_SERVER_URL=ws://localhost:8080/ws
MULTICA_APP_URL=http://localhost:3000
MULTICA_DAEMON_CONFIG=
MULTICA_WORKSPACE_ID=
MULTICA_DAEMON_ID=
MULTICA_DAEMON_DEVICE_NAME=
MULTICA_DAEMON_POLL_INTERVAL=3s
MULTICA_DAEMON_HEARTBEAT_INTERVAL=15s
MULTICA_CODEX_PATH=codex
MULTICA_CODEX_MODEL=
MULTICA_CODEX_WORKDIR=
MULTICA_CODEX_TIMEOUT=20m
# Self-host image channel
# Default stable release channel. Pin to an exact release like v0.2.4 if you
# want to stay on a specific version. If the selected tag has not been
# published to GHCR yet, use make selfhost-build / the build override instead.
MULTICA_IMAGE_TAG=latest
MULTICA_BACKEND_IMAGE=ghcr.io/multica-ai/multica-backend
MULTICA_WEB_IMAGE=ghcr.io/multica-ai/multica-web
# Email
# Two delivery options - only one needs to be configured:
#
# Option A: Resend (SaaS, recommended for cloud deployments)
# Set RESEND_API_KEY to a key from resend.com and verify your sending domain there.
# For local/dev use, leave RESEND_API_KEY empty - codes print to stdout. To
# accept a fixed local code, also set MULTICA_DEV_VERIFICATION_CODE above
# (ignored when APP_ENV=production).
RESEND_API_KEY=
RESEND_FROM_EMAIL=noreply@multica.ai
#
# Option B: SMTP relay (for self-hosted / on-premise deployments)
# Takes priority over Resend when SMTP_HOST is set.
# Supports unauthenticated relay (leave SMTP_USERNAME empty) and authenticated SMTP.
# Set SMTP_TLS_INSECURE=true only for private CA or self-signed certificates.
SMTP_HOST=
SMTP_PORT=25
SMTP_USERNAME=
SMTP_PASSWORD=
SMTP_TLS_INSECURE=false
# Google OAuth
# The web login page reads GOOGLE_CLIENT_ID from /api/config at runtime, so
# changing it only requires restarting the backend / compose stack. No web
# rebuild is needed.
GOOGLE_CLIENT_ID=
GOOGLE_CLIENT_SECRET=
GOOGLE_REDIRECT_URI=http://localhost:3000/auth/callback
# S3 / CloudFront
# S3_BUCKET — bucket NAME only (e.g. "my-bucket"). Do NOT include the
# ".s3.<region>.amazonaws.com" suffix; the server builds the public URL
# from S3_BUCKET + S3_REGION. S3_REGION must match the bucket's real region.
S3_BUCKET=
S3_REGION=us-west-2
CLOUDFRONT_KEY_PAIR_ID=
CLOUDFRONT_PRIVATE_KEY_SECRET=multica/cloudfront-signing-key
CLOUDFRONT_PRIVATE_KEY=
CLOUDFRONT_DOMAIN=
# COOKIE_DOMAIN — optional Domain attribute on session + CloudFront cookies.
# Leave empty for single-host deployments (localhost, LAN IP, or a single
# hostname) — session cookies become host-only, which is what the browser
# wants. Only set it when the frontend and backend sit on different
# subdomains of one registered domain (e.g. ".example.com"). Do NOT set it
# to an IP address: RFC 6265 forbids IP literals in the cookie Domain
# attribute and browsers silently drop such cookies.
COOKIE_DOMAIN=
# Local file storage (fallback when S3_BUCKET is not set)
LOCAL_UPLOAD_DIR=./data/uploads
LOCAL_UPLOAD_BASE_URL=http://localhost:8080
# Security
# Comma-separated list of allowed origins for CORS and WebSocket connections.
# Defaults to localhost dev origins when unset.
# Example: ALLOWED_ORIGINS=https://app.multica.ai,https://staging.multica.ai
ALLOWED_ORIGINS=
# Realtime metrics endpoint (/health/realtime) access control. See MUL-1342.
# When unset, the endpoint only serves direct loopback (127.0.0.1 / ::1)
# callers with no forwarding headers and returns 404 to everything else —
# safe for local dev. Any deployment behind a reverse proxy (Caddy / Nginx
# terminating TLS in front of localhost:8080) MUST set this token, since
# proxied requests look like loopback at the Go layer; with no token, those
# requests are refused with 404. Pass the token as
# `Authorization: Bearer <token>`.
# REALTIME_METRICS_TOKEN=
# GitHub App integration (Settings → Integrations "Connect GitHub")
# Both must be set for the Connect button to enable and for webhooks to be
# accepted; leave empty to disable the integration. See docs/github-integration.
# GITHUB_APP_SLUG is the tail of https://github.com/apps/<slug>.
GITHUB_APP_SLUG=
GITHUB_WEBHOOK_SECRET=
# Frontend
FRONTEND_PORT=3000
FRONTEND_ORIGIN=http://localhost:3000
# Leave empty — auto-derived from page origin in browser, set by Makefile for local dev.
# Only set explicitly if frontend and backend are on different domains.
NEXT_PUBLIC_API_URL=
NEXT_PUBLIC_WS_URL=
# Remote API (optional) — set to proxy local frontend to a remote backend
# Leave empty to use local backend (localhost:8080)
# REMOTE_API_URL=https://multica-api.copilothub.ai
# ==================== Self-hosting: Control Signups (fixes #930) ====================
# Set to "false" to completely disable new user signups (recommended for private instances)
ALLOW_SIGNUP=true
# The web UI reads ALLOW_SIGNUP from /api/config at runtime, so toggling this
# only requires restarting the backend / compose stack — not rebuilding web.
# It is not hot-reloaded.
# Optional: Only allow emails from these domains (comma-separated)
ALLOWED_EMAIL_DOMAINS=
# Optional: Only allow these exact email addresses (comma-separated)
ALLOWED_EMAILS=
# ==================== Analytics (PostHog) ====================
# Product analytics events feed the acquisition → activation → expansion funnel.
# Leave POSTHOG_API_KEY empty for local dev / self-hosted instances; the server
# will run a no-op analytics client and ship nothing. See docs/analytics.md.
POSTHOG_API_KEY=
POSTHOG_HOST=https://us.i.posthog.com
# Optional override for the `environment` PostHog event property.
# Defaults from APP_ENV and normalizes to production / staging / dev.
ANALYTICS_ENVIRONMENT=
# Force the no-op client even when POSTHOG_API_KEY is set (CI / opt-out).
ANALYTICS_DISABLED=