docs: document all env vars and remove SMTP/webhook from docker config

SMTP and webhook settings are configured via Admin UI only.

Made-with: Cursor

docker-compose.yml

@@ -18,31 +18,17 @@ services:
     environment:
       - NODE_ENV=production
       - PORT=3000
-      # Auto-generated if not set; persist across restarts for stable sessions
-      - JWT_SECRET=${JWT_SECRET:-}
-      # Timezone for logs, reminders and scheduled tasks (e.g. Europe/Berlin)
-      - TZ=${TZ:-UTC}
-      # info = concise user actions; debug = verbose admin-level details
-      - LOG_LEVEL=${LOG_LEVEL:-info}
-      # Comma-separated origins for CORS and email notification links
-      - ALLOWED_ORIGINS=${ALLOWED_ORIGINS:-}
-      # Redirect HTTP to HTTPS when behind a TLS-terminating proxy
-      # - FORCE_HTTPS=true
-      # Number of trusted proxies (for X-Forwarded-For / real client IP)
-      # - TRUST_PROXY=1
-
-      ## ── OIDC / SSO ──────────────────────────────────────────────
-      # OpenID Connect provider URL
-      # - OIDC_ISSUER=https://auth.example.com
-      # - OIDC_CLIENT_ID=trek
-      # - OIDC_CLIENT_SECRET=supersecret
-      # Label shown on the SSO login button
-      # - OIDC_DISPLAY_NAME=SSO
-      # Set true to disable local password auth entirely (SSO only)
-      # - OIDC_ONLY=false
-
-      ## ── Demo mode (resets data hourly) ──────────────────────────
-      # - DEMO_MODE=false
+      - JWT_SECRET=${JWT_SECRET:-} # Auto-generated if not set; persist across restarts for stable sessions
+      - TZ=${TZ:-UTC} # Timezone for logs, reminders and scheduled tasks (e.g. Europe/Berlin)
+      - LOG_LEVEL=${LOG_LEVEL:-info} # info = concise user actions; debug = verbose admin-level details
+      - ALLOWED_ORIGINS=${ALLOWED_ORIGINS:-} # Comma-separated origins for CORS and email notification links
+      - FORCE_HTTPS=true # Redirect HTTP to HTTPS when behind a TLS-terminating proxy
+      - TRUST_PROXY=1 # Number of trusted proxies (for X-Forwarded-For / real client IP)
+      - OIDC_ISSUER=https://auth.example.com # OpenID Connect provider URL
+      - OIDC_CLIENT_ID=trek # OpenID Connect client ID
+      - OIDC_CLIENT_SECRET=supersecret # OpenID Connect client secret
+      - OIDC_DISPLAY_NAME=SSO # Label shown on the SSO login button
+      - OIDC_ONLY=false # Set true to disable local password auth entirely (SSO only)
     volumes:
       - ./data:/app/data
       - ./uploads:/app/uploads