Upstream sources — ghost

service	image	source repo	releases / changelog
app	ghost	https://github.com/TryGhost/Ghost	https://github.com/TryGhost/Ghost/releases
db	mysql	https://github.com/mysql/mysql-server	https://dev.mysql.com/doc/relnotes/mysql/8.4/en/

Standing notes

Ghost 6.x stores ALL content in MySQL (database__client: mysql), NOT sqlite. Marker/test rows live in the ghost DB.
MySQL 8.0 → 8.4 (LTS): no application-level migrations needed for Ghost's usage. Default value changes are internal to InnoDB (e.g. innodb_io_capacity 200→10000, innodb_flush_method fsync→O_DIRECT). The ci_marker table and Ghost schema survive the upgrade intact.
The recipe ships a literal start_period: 15m on both app and db healthchecks (added in recipe PR #1) to handle cc-ci's slow first-boot MySQL schema migration (~6-15 min). The compose.ccci.yml overlay mirrors this for the upgrade-tier BASE deploy.
Ghost 6.x Docker images use the -alpine variant; pin to X.Y.Z-alpine (not X.Y.Z-alpine3.NN) for simplicity.