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picpeak/backend/.env.example
T
Paul Nothaft 8337a716b1 fix(file-watcher): bound concurrent photo processing (#846)
* fix(file-watcher): bound concurrent photo processing

chokidar fires 'add' once per file — with no ignoreInitial option the
boot scan fires it for every existing file, and a bulk drop into the
watch folder fires it for every new one at once. Each handler runs DB
lookups plus (for new files) a full sharp pipeline; sharp.concurrency(2)
only caps libvips threads WITHIN one operation, not the number of
parallel pipelines, so unbounded handlers can OOM small hosts.

Gate both 'add' and 'unlink' through a shared p-limit
(FILE_WATCHER_CONCURRENCY, default 2, floor 1) — mass deletes otherwise
burst DB work and ZIP-cache invalidation the same way. p-limit is pinned
to ^3.1.0, the last CommonJS release.

Adapted from the filpgame fork (426ca491) — thanks @filpgame; extended
to cover 'unlink', documented in .env.example, plus a lock-in test for
the existing Sharp cache/concurrency caps this bound relies on.

* chore(compose): pass FILE_WATCHER_CONCURRENCY into the backend container (codex review of #846)

The backend service uses an explicit environment list (no env_file), so
the documented override never reached the container in the default
compose deployments. Added to both compose files + root .env.example.
2026-07-19 22:00:46 +02:00

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# Backend Environment Variables Example
# Copy this file to .env and update with your values
# Application
NODE_ENV=production
PORT=3001
# Security
# Generate with: openssl rand -base64 32
JWT_SECRET=your-very-secure-jwt-secret-at-least-32-characters-long-example123456
# Admin 2FA (TOTP) secret encryption key — OPTIONAL.
# Admin authenticator secrets are encrypted at rest (AES-256-GCM). By default
# the key is derived from JWT_SECRET, so you do NOT need to set this. Set it
# only if you want the MFA encryption key decoupled from JWT_SECRET (e.g. so
# rotating JWT_SECRET doesn't invalidate enrolled authenticators). If you set
# it, changing/losing it makes existing 2FA secrets undecryptable — recover
# with: docker compose exec backend node scripts/reset-admin-mfa.js --all --yes
# Generate with: openssl rand -base64 32
#MFA_ENCRYPTION_KEY=
# Auth cookie Secure flag
# unset - default: 'auto' in production, false in dev (#427)
# true - always set Secure (HTTPS-only cookies; breaks plain-HTTP access —
# login appears to succeed but the browser silently drops the
# cookie, leaving you in a redirect loop. Only set this if you
# ALWAYS reach the site via HTTPS)
# false - never set Secure (allows HTTP; cookies not protected on HTTPS)
# auto - decide per request: Secure on HTTPS, not on HTTP. Reads
# req.secure from Express which respects X-Forwarded-Proto from a
# trusted reverse proxy. This is the default and is the right
# choice for most deployments.
#
# Why 'auto' is the default in production:
# - On real HTTPS (reverse proxy with X-Forwarded-Proto), req.secure is
# true → Secure flag is still emitted. No security regression vs. true.
# - On plain HTTP (LAN access, first-time install before reverse proxy is
# wired up), req.secure is false → Secure flag is omitted → login works
# instead of silently looping back to /admin/login.
#
# When you'd set this explicitly:
# - COOKIE_SECURE=true → strict HTTPS-only deployments where you want
# defense in depth against accidentally serving over HTTP.
# - COOKIE_SECURE=false → you intentionally only ever serve over HTTP and
# don't want the per-request check (rare).
#
# Requirements for 'auto' mode to detect HTTPS correctly:
# 1. Your reverse proxy MUST send X-Forwarded-Proto: https on HTTPS
# requests. Standard configs for NPM/Traefik/Caddy do this by default.
# 2. The proxy must be on a trusted IP range. By default PicPeak trusts
# loopback and private networks (127.0.0.1, 10.x, 172.16-31.x,
# 192.168.x, link-local). Proxies outside those ranges need custom
# trust proxy configuration.
# COOKIE_SECURE=auto
# Cookie SameSite attribute (Lax | Strict | None). Default: Lax
# COOKIE_SAMESITE=Lax
# Cookie Domain — set this if serving auth cookies across subdomains.
# Leave unset for same-origin setups.
# COOKIE_DOMAIN=.example.com
# URLs (adjust for your domain)
ADMIN_URL=https://photos.example.com
FRONTEND_URL=https://photos.example.com
BACKEND_URL=https://photos.example.com # Or https://api.photos.example.com if separate
# API URL for email assets (logos, images in emails)
# This must be the publicly accessible URL where recipients can load images
# If not set, defaults to http://localhost:3001 which will break images in production emails
API_URL=https://photos.example.com/api
# Database Configuration
DATABASE_CLIENT=pg
DB_HOST=localhost
DB_PORT=5432
DB_USER=picpeak
DB_PASSWORD=your-secure-database-password-change-this
DB_NAME=picpeak
# Email Configuration (Examples for common providers)
# Gmail example:
# SMTP_HOST=smtp.gmail.com
# SMTP_PORT=587
# SMTP_SECURE=false
# SMTP_USER=your-email@gmail.com
# SMTP_PASS=your-app-specific-password
# SendGrid example:
SMTP_HOST=smtp.sendgrid.net
SMTP_PORT=587
SMTP_SECURE=false
SMTP_USER=apikey
SMTP_PASS=your-sendgrid-api-key
EMAIL_FROM=noreply@example.com
# Storage Paths
# IMPORTANT: STORAGE_PATH must be set to avoid file path resolution issues
# Docker deployment:
STORAGE_PATH=/app/storage
EVENTS_PATH=/app/storage/events
ARCHIVE_PATH=/app/storage/events/archived
# Local development:
# STORAGE_PATH=./storage
# EVENTS_PATH=./storage/events
# ARCHIVE_PATH=./storage/events/archived
# File watcher (auto-import from the events/active folder, local storage only)
# Max photos processed in parallel by the watcher. The boot scan and bulk
# folder drops fire one handler per file — this bound keeps thumbnail
# generation from exhausting memory on small hosts. Default: 2
# FILE_WATCHER_CONCURRENCY=2
# Analytics Backend Configuration (OPTIONAL)
# Used for server-side tracking only
# Primary configuration should be done through Admin UI > Settings > Analytics
# UMAMI_URL=https://analytics.example.com
# UMAMI_WEBSITE_ID=b4d3c2a1-5678-90ab-cdef-1234567890ab
# Logging
LOG_LEVEL=info