Fix setup for devcontainers

Since PostgreSQL 18, data stored within the Docker volume is also version-prefixed. Thus, we need to change the path slightly.

Furthermore, we don't want the web service to be started automatically when _building_ the devcontainer. Otherwise, the building process won't finish at all.

Author: MrSerth

.devcontainer/compose.yaml

@@ -31,7 +31,7 @@ services:
     networks:
       - default
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres-data:/var/lib/postgresql
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres

.devcontainer/devcontainer.json

@@ -44,5 +44,5 @@
 
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  "postCreateCommand": "bin/setup"
+  "postCreateCommand": "bin/setup --skip-server"
 }