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HealthLog/.env.example
T
Marc-André BombeckandClaude Opus 4.7 85f9a07daf fix(setup): make docker compose work out of the box (#88)
Issue #88 (kevinpapst): the bundled docker-compose.yml didn't actually
work. Three concrete blockers:

- expose:3000 → ports:"3000:3000" so the host can reach the app
- POSTGRES_PASSWORD was hard-coded to "healthlog" — now required via
  env var, and DATABASE_URL inside the compose service interpolates
  the same variable so the two cannot drift apart
- .env.example DATABASE_URL pointed at localhost:5432, which never
  resolves inside the app container; replaced with db:5432 plus a
  note explaining the local-dev variant

.env.example is also rewritten as proper documentation: each variable
explains what it does, why it matters, and how to generate it
(openssl rand -hex 32 for the three 32-byte secrets, openssl rand
-base64 24 for the Postgres password). Required vs optional are now
clearly grouped.

README Quick Start gives a realistic time estimate, generates the four
secrets in one block straight into .env, and points reverse-proxy
users at the docs site.

Pre-built GHCR images and a docs-vs-repo single-source-of-truth for
docker-compose are tracked separately in Phase 2 of the audit plan
(see docs/audit/2026-04-26-PLAN.md).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-26 23:22:10 +02:00

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# =============================================================================
# HealthLog — Environment Configuration
# =============================================================================
# Copy this file to .env and fill in the values.
# $ cp .env.example .env
#
# Required variables: DATABASE_URL or POSTGRES_PASSWORD, SESSION_SECRET,
# ENCRYPTION_KEY, API_TOKEN_HMAC_KEY
#
# Generate the three secrets with:
# $ openssl rand -hex 32 # any UNIX shell
# $ node -e 'console.log(require("crypto").randomBytes(32).toString("hex"))'
#
# All secrets must be 64-character hex strings (= 32 bytes).
# =============================================================================
# -----------------------------------------------------------------------------
# Database
# -----------------------------------------------------------------------------
# When using docker-compose.yml: the app container reaches Postgres via the
# service name "db", so the hostname is "db" — NOT "localhost".
# When developing without Docker (`pnpm dev` against a host-installed Postgres):
# change the hostname to "localhost" and adjust the credentials.
DATABASE_URL="postgresql://healthlog:CHANGE-ME@db:5432/healthlog?schema=public"
# Postgres password — used both by the db service AND by DATABASE_URL above.
# Pick a strong random password, e.g. `openssl rand -base64 24`.
POSTGRES_PASSWORD="CHANGE-ME"
# -----------------------------------------------------------------------------
# App URL
# -----------------------------------------------------------------------------
# The public URL where users reach the app. Behind a reverse proxy with TLS,
# this looks like https://healthlog.example.com. For local dev, leave default.
NEXT_PUBLIC_APP_URL="http://localhost:3000"
APP_URL="http://localhost:3000"
# Node environment: "development" for `pnpm dev`, "production" for Docker.
NODE_ENV="development"
# -----------------------------------------------------------------------------
# Required Secrets — generate with `openssl rand -hex 32`
# -----------------------------------------------------------------------------
# Signs session cookies. Rotating it logs out everyone.
SESSION_SECRET="REPLACE-WITH-OUTPUT-OF-openssl-rand-hex-32"
# AES-256-GCM key for encrypting Withings tokens, GitHub PATs, AI provider
# keys, and VAPID private keys at rest. Rotate carefully — old ciphertexts
# need re-encryption.
ENCRYPTION_KEY="REPLACE-WITH-OUTPUT-OF-openssl-rand-hex-32"
# HMAC-SHA256 key for hashing external-API Bearer tokens before storing them
# in the database. Rotating it invalidates all issued tokens.
API_TOKEN_HMAC_KEY="REPLACE-WITH-OUTPUT-OF-openssl-rand-hex-32"
# -----------------------------------------------------------------------------
# Withings OAuth (optional — for automatic scale/BP/activity sync)
# -----------------------------------------------------------------------------
# Register an app at https://developer.withings.com/ and paste the credentials
# here. Per-user OAuth credentials can also be configured in Settings.
# WITHINGS_CLIENT_ID=""
# WITHINGS_CLIENT_SECRET=""
# WITHINGS_REDIRECT_URI="https://healthlog.example.com/api/withings/callback"
# WITHINGS_WEBHOOK_SECRET="" # any random string — used to harden the webhook URL
# -----------------------------------------------------------------------------
# Telegram (optional — webhook hardening)
# -----------------------------------------------------------------------------
# Set to verify incoming Telegram updates. The bot token itself is configured
# per-user in Settings (encrypted at rest).
# TELEGRAM_WEBHOOK_SECRET=""
# -----------------------------------------------------------------------------
# AI Provider (optional)
# -----------------------------------------------------------------------------
# Users bring their own API keys via Settings. No server-side key needed by
# default. The admin can configure a fallback key in the Admin Panel.
# -----------------------------------------------------------------------------
# Structured Logging — Wide Events (optional, sensible defaults)
# -----------------------------------------------------------------------------
# Levels: debug | info | warn | error
# LOG_LEVEL="info"
# Sample rate for successful requests (0.0 = sample nothing, 1.0 = log all).
# Errors and slow requests are ALWAYS logged regardless of this setting.
# LOG_SAMPLE_RATE="1.0"
# Slow-request threshold in milliseconds — anything slower is always kept.
# LOG_SLOW_THRESHOLD_MS="3000"
# Include stack traces on error events. Disable in environments where logs
# leave the host unencrypted.
# LOG_INCLUDE_STACK="true"
# Optional: ship Wide Events to Loki. Leave blank for stdout-only logging.
# LOKI_ENDPOINT="http://loki:3100"
# LOKI_USERNAME=""
# LOKI_PASSWORD=""