Add 3dprint secrets reference

secrets/3dprint.secrets.example

@@ -0,0 +1,35 @@
+# 3dprint Stack — Secrets Reference
+# Source: 3dprint.env
+#
+# Add SECRET values to Woodpecker at:
+#   https://woodpecker.bryanmail.net
+#   homelab/compose-files → Settings → Secrets
+#
+# NON-SECRET values can be hardcoded in 3dprint.yaml or left in 3dprint.env
+
+# ── SECRETS (add to Woodpecker) ───────────────────────────────────────────────
+
+# Woodpecker secret name:  3dprint_db_password
+# Used for:               Spoolman PostgreSQL database password
+# Env var in .env:        SPOOLMAN_DB_PASSWORD
+3dprint_db_password=
+
+# ── NON-SECRETS (safe in compose file or .env) ────────────────────────────────
+
+# SPOOLMAN_DB_HOST        PostgreSQL hostname (db)
+# SPOOLMAN_DB_PORT        PostgreSQL port (5432)
+# SPOOLMAN_DB_NAME        Database name (spoolman)
+# SPOOLMAN_DB_USERNAME    Database username (Spoolman)
+# PUID                    Process UID (1026)
+# PGID                    Process GID (100)
+# FORWARDED_ALLOW_IPS     Trusted proxy CIDR
+# SPOOLMAN_HOST           Traefik hostname
+# MMP_HOST                Traefik hostname
+# OCTOPRINT_HOST          Traefik hostname
+
+# ── Woodpecker provision-secrets case entry ───────────────────────────────────
+# Add this to the provision-secrets step in .woodpecker.yml:
+#
+#   3dprint)
+#     create_or_update_secret "3dprint_db_password" "$SECRET_3DPRINT_DB_PASSWORD"
+#     ;;