use newer version of postgres and fix permissions

docker-compose.yml

@@ -2,7 +2,8 @@ version: '3.1'
 
 services:
   postgres:
-      image: postgres:12
+      image: postgres:15
+      user: "1000:1000"
       environment:
         POSTGRES_DB: compendium
         POSTGRES_USER: compendium
@@ -12,4 +13,6 @@ services:
       ports:
           - "65000:5432"
       volumes:
-          - ./build/db:/var/lib/postgresql
+          # ensure that /build/postgresql/data exists and is owned by your user (1000:1000)
+          - ./build/postgresql/data:/var/lib/postgresql/data
+          - /etc/passwd:/etc/passwd:ro