⛓️‍💥 🐳 Bump postgis/postgis from 17-3.6-alpine to 18-3.6-alpine in /docker/src/main/docker/pg_conf ⛓️‍💥

⛓️‍💥 🐳 Bump postgis/postgis from 17-3.6-alpine to 18-3.6-alpine in /docker/src/main/docker/pg_conf ⛓️‍💥 #548