fix(backup) + chore: upgrade to 1.3.0+6.42.0-alpine

- Inline mysqldump/gunzip into backupbot.backup.pre-hook and
  backupbot.restore.post-hook label values on the db service.
  Single-file gzipped dump (--single-transaction --routines
  --triggers --databases ghost) is written into the mysql volume
  at /var/lib/mysql/backup.sql.gz; the volume is what backupbot
  snapshots, so the dump survives the round-trip and the restore
  hook re-imports it. Replaces the previous mysqldump --tab
  backup that shipped with no restore hook (silent data loss on
  restore, since the mysql data volume itself wasn't backed up).
- Drop mysql_backup.sh, its config mount, and MYSQL_BACKUP_VERSION
  in favour of the inline label pattern used by
  akaunting / engelsystem / forgejo.
- Raise app healthcheck start_period 1m -> 15m to accommodate
  slow fresh-DB migration on first boot.
- Upgrade ghost image to 6.42.0-alpine; bump recipe version to
  1.3.0+6.42.0-alpine.

abra.sh

@@ -1 +1 @@
-export GHOST_ENTRYPOINT_VERSION=v1
+export GHOST_ENTRYPOINT_VERSION=v1

compose.yml

@@ -1,6 +1,6 @@
 services:
   app:
-    image: ghost:6.21.2-alpine
+    image: ghost:6.42.0-alpine
     environment:
       # see https://ghost.org/docs/config/#configuration-options
       database__client: mysql
@@ -51,13 +51,13 @@ services:
         - "traefik.http.middlewares.${STACK_NAME}-redirect.redirectscheme.permanent=true"
         - "backupbot.backup=true"
         - "backupbot.backup.path=/var/lib/ghost/content"
-        - "coop-cloud.${STACK_NAME}.version=1.2.0+6.21.2-alpine"
+        - "coop-cloud.${STACK_NAME}.version=1.3.0+6.42.0-alpine"
     healthcheck:
       test: ["CMD", "wget", "--header=X-Forwarded-Proto: https", "--spider", "-q", "http://localhost:2368/ghost/api/admin/site"]
       interval: 30s
       timeout: 10s
       retries: 10
-      start_period: 1m
+      start_period: 15m
  
   db:
     image: mysql:8.0
@@ -72,9 +72,9 @@ services:
     deploy:
       labels:
         - "backupbot.backup=true"
-        - "backupbot.backup.pre-hook=mysqldump -u root -p\"$$(cat /run/secrets/db_password)\" ghost --tab /var/lib/mysql-files/"
-        - "backupbot.backup.post-hook=rm -rf /var/lib/mysql-files/*"
-        - "backupbot.backup.path=/var/lib/mysql-files/"
+        - 'backupbot.backup.pre-hook=mysqldump -u root -p"$$(cat /run/secrets/db_password)" --single-transaction --routines --triggers --databases ghost | gzip > /var/lib/mysql/backup.sql.gz'
+        - "backupbot.backup.volumes.mysql.path=backup.sql.gz"
+        - 'backupbot.restore.post-hook=gunzip -c /var/lib/mysql/backup.sql.gz | mysql -u root -p"$$(cat /run/secrets/db_password)"'
 
     healthcheck:
       test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-p\"$$(cat /run/secrets/db_password)\""]
@@ -103,4 +103,4 @@ secrets:
 configs:
   ghost_entrypoint:
     name: ${STACK_NAME}_ghost_entrypoint_${GHOST_ENTRYPOINT_VERSION}
-    file: entrypoint.sh
+    file: entrypoint.sh