Update postgres Docker tag to v18

audiomuse/docker-compose.yml

@@ -13,7 +13,7 @@ services:
 
   # PostgreSQL database service
   audiomuse-ai-postgres:
-    image: postgres:15-alpine
+    image: postgres:18-alpine
     container_name: audiomuse-postgres
     env_file:
       - .env

shlink/docker-compose.yml

@@ -18,7 +18,7 @@ services:
     depends_on:
       - shlink_db
   shlink_db:
-    image: postgres:17
+    image: postgres:18
     container_name: shlink_db
     restart: always
     volumes:

spliit/docker-compose.yml

@@ -16,7 +16,7 @@ services:
       POSTGRES_USER: ${SPLIIT_POSTGRES_USER}
       POSTGRES_PASSWORD: ${SPLIIT_POSTGRES_PASSWORD}
   spliit_db:
-    image: postgres:17
+    image: postgres:18
     restart: always
     volumes:
       - ${SPLIIT_POSTGRES_DIR}:/var/lib/postgresql/data