bump postgis

Author: nyurik

.devcontainer/docker-compose.yml

@@ -23,7 +23,7 @@ services:
 #      - "80"
 
   db:
-    image: postgis/postgis:16-3.4-alpine
+    image: postgis/postgis:18-3.6-alpine
     restart: unless-stopped
     environment:
       - POSTGRES_DB=maplibre