Update PostGIS 3.6.3, prepare for 3.7, and refresh images

[ImreSamu]

• Remove PostgreSQL 13 images.
• Update Alpine images to Alpine 3.23.
• Update PostgreSQL 18 / PostGIS 3.6.3 Debian and Alpine images.
• Refresh master images:
  • Remove 16-master.
  • Move 17-master and 18-master to Debian Trixie.
  • Fix Trixie dependencies: PCRE2, TIFF6, t64 runtime packages, and Boost 1.83 alignment.
  • Build CGAL from the 6.1.x branch for SFCGAL compatibility.
  • Install h3/h3_postgis and address_standardizer from their upstream main branches.
    • https://github.com/postgis/h3-pg
    • https://github.com/postgis/address_standardizer
  • Run targeted h3-pg regress tests and address_standardizer installcheck.
• Prepare for PostGIS >= 3.7:
  • Update initdb-postgis.sh for optional extension changes.
  • Handle address_standardizer and postgis_tiger_geocoder moving out of PostGIS itself.
  • Update postgis-basics to require address_standardizer tests for PostGIS 3.5/3.6 and run them for 3.7+ when available.
• Update README.md with the supported version range, Alpine 3.23 package versions, and master image notes.
• Update GitHub workflow for the refreshed image matrix.

NOTES:

Starting with PostGIS 3.7, PostGIS itself no longer includes the address_standardizer and postgis_tiger_geocoder extensions. Now with this change - the *-master images install address_standardizer separately from its upstream repository and run its upstream-style installcheck.
See: https://lists.osgeo.org/pipermail/postgis-devel/2026-February/030730.html

Given these changes, this seems like a good opportunity to stop auto-initializing the postgis_tiger_geocoder extension for PostGIS >= 3.7, even if we end up keeping address_standardizer in the Docker image.

Adding h3-pg to the *-master images is part of this proposal. ( as an extra )

If this PR is considered too large or too broad in scope, I can split it into multiple PRs.

[Copilot]

Pull request overview

Updates the Docker image matrix to drop PostgreSQL 13, refresh Alpine/Debian bases, and modernize *-master images for upcoming PostGIS 3.7+ extension packaging changes (address_standardizer/tiger geocoder) while adding h3-pg to master builds.

Changes:

• Remove PostgreSQL 13 images; bump Alpine base to 3.23; update PostGIS 3.6.3 images.
• Refresh *-master images to Debian Trixie, CGAL 6.1.x branch, and install/test h3-pg + address_standardizer from upstream.
• Adjust init/test scripts to conditionally handle postgis_tiger_geocoder and address_standardizer for PostGIS >= 3.7.

Reviewed changes

Copilot reviewed 36 out of 37 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
update.sh	Updates Alpine suite default, master suite selection, Boost version handling, and injects new git-hash placeholders (CGAL branch, h3-pg, address_standardizer).
test/tests/postgis-basics/run.sh	Makes address_standardizer test conditional based on PostGIS version / extension availability.
initdb-postgis.sh	Stops auto-initializing tiger geocoder for PostGIS >= 3.7 via version-gated DO block.
README.md	Updates supported versions, Alpine 3.23 package versions, master-image notes, and removes PG13 references.
Dockerfile.master.template	Moves master images to updated deps (pcre2/tiff6/t64 packages), adds h3-pg + address_standardizer build/tests, and conditionally creates optional extensions.
Dockerfile.alpine.template	Bumps base image to postgres:* -alpine3.23.
18-master/update-postgis.sh	Adds update script for 18-master (currently still assumes tiger geocoder + POSTGIS_VERSION).
18-master/initdb-postgis.sh	Adds initdb script for 18-master with PostGIS<3.7 tiger gating.
18-master/Dockerfile	Regenerates master image on postgres:18-trixie, updated deps and upstream git hashes, plus h3/address_standardizer install/tests.
18-3.6/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 18-3.6 Debian init.
18-3.6/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 18-3.6 Alpine init.
18-3.6/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.6.3 + new SHA256.
18-3.6/Dockerfile	Updates Debian package version to PostGIS 3.6.3.
17-master/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 17-master init.
17-master/Dockerfile	Regenerates master image on postgres:17-trixie, updated deps and upstream git hashes, plus h3/address_standardizer install/tests.
17-3.6/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 17-3.6 Alpine init.
17-3.6/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.6.3 + new SHA256.
17-3.5/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 17-3.5 Debian init.
17-3.5/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 17-3.5 Alpine init.
17-3.5/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.5.6 + new SHA256.
16-master/update-postgis.sh	Removes 16-master update script.
16-master/initdb-postgis.sh	Removes 16-master init script.
16-3.5/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 16-3.5 Debian init.
16-3.5/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 16-3.5 Alpine init.
16-3.5/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.5.6 + new SHA256.
15-3.5/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 15-3.5 Debian init.
15-3.5/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 15-3.5 Alpine init.
15-3.5/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.5.6 + new SHA256.
14-3.5/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 14-3.5 Debian init.
14-3.5/alpine/initdb-postgis.sh	Applies PostGIS<3.7 tiger gating to 14-3.5 Alpine init.
14-3.5/alpine/Dockerfile	Updates to Alpine 3.23 + PostGIS 3.5.6 + new SHA256.
13-3.5/update-postgis.sh	Removes PG13 update script.
13-3.5/initdb-postgis.sh	Removes PG13 init script.
13-3.5/alpine/initdb-postgis.sh	Removes PG13 Alpine init script.
13-3.5/alpine/Dockerfile	Removes PG13 Alpine Dockerfile.
13-3.5/Dockerfile	Removes PG13 Debian Dockerfile.
.github/workflows/main.yml	Drops PG13 from CI matrix and updates master builds to PG17/18.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[ImreSamu]

ready to review

[phillipross]

lgtm, thanks!