chore: change mount path to work with postgres:18

[dvdksn]

Description

Changes the mount path for postgres examples to work with postgres:18

Related issues or tickets

• Change PGDATA in 18+ to /var/lib/postgresql/MAJOR/docker docker-library/postgres#1259
• closes Wrong volume path for running the Postgres container #23789
• closes MySQL #23791

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[tianon-sso]

A lot of these examples appear to be running < 18 versions of PostgreSQL (many postgres:16), and this will only work as-is with 18+ 🙈

There are also a few examples here using postgres:latest, so you may appreciate being aware of docker-library/postgres#1294 😬

[dvdksn]

A lot of these examples appear to be running < 18 versions of PostgreSQL (many postgres:16), and this will only work as-is with 18+ 🙈

oops I didn't catch that!

There are also a few examples here using postgres:latest, so you may appreciate being aware of docker-library/postgres#1294 😬

Makes sense. I've updated all our examples to use the :18 tag now, with the new mount path.

[tianon-sso]

🫶 🚀