feat(deploy): env-overridable volume names + host port for Coolify

BF_DATA_VOLUME_NAME, NODERED_DATA_VOLUME_NAME, BF_HOST_PORT keep the
compose public while letting per-deployment specifics (host paths,
multiple staging/prod instances on one host, alternate edge ports)
land in Coolify's env tab. Defaults preserve current behaviour.

deploy/docker/docker-compose.yml

@@ -4,12 +4,18 @@
 # Usage:
 #   docker compose -f deploy/docker/docker-compose.yml up -d --build
 #
-# Volumes:
+# Volumes (override per-deployment via env — see Coolify "Environment"):
-#   betterframe-data: sqlite DB + secret.key
+#   BF_DATA_VOLUME_NAME       default "betterframe-data"
-#   nodered-data: Node-RED flows
+#   NODERED_DATA_VOLUME_NAME  default "nodered-data"
+#   BF_HOST_PORT              default 80 (host edge port mapped to angie)
 #
-# Only 0.0.0.0:80 is published on the host. Backend services and Node-RED
+# Coolify ops: set these env vars on the resource so each deployment owns its
-# are reachable only from within the Docker network.
+# own named volumes (e.g. "bf-prod-data" vs "bf-staging-data"). For host bind
+# mounts or NFS / S3-CSI volumes, use Coolify's per-service "Storage" UI
+# rather than templating driver_opts here — JSON injection via env is brittle.
+#
+# Only ${BF_HOST_PORT}:80 is published on the host. Backend services and
+# Node-RED are reachable only from within the Docker network.
 version: "3.8"
 
 services:
@@ -57,7 +63,7 @@ services:
       - server
       - nodered
     ports:
-      - "80:80"
+      - "${BF_HOST_PORT:-80}:80"
     volumes:
       - ../angie/betterframe.docker.conf:/etc/nginx/conf.d/default.conf:ro
     networks:
@@ -86,8 +92,14 @@ services:
       - betterframe
 
 volumes:
+  # Top-level keys are the in-compose references used above. `name:` sets the
+  # actual docker volume name on the host so multiple Coolify deployments on
+  # the same host can share machine without name collisions. Default keeps
+  # backward compat with existing single-host deployments.
   betterframe-data:
+    name: ${BF_DATA_VOLUME_NAME:-betterframe-data}
   nodered-data:
+    name: ${NODERED_DATA_VOLUME_NAME:-nodered-data}
 
 networks:
   betterframe: