Fix

postgres/.env.example

@@ -1,4 +1,2 @@
-SHARED_DB_USER=
 SHARED_DB_PASSWORD=
-SHARED_DB_DB=
 SHARED_DB_DATA_DIR=

postgres/docker-compose.yml

@@ -12,9 +12,9 @@ services:
       - ../paperless/.env
       - ../synapse/.env
     environment:
-      POSTGRES_USER: ${SHARED_DB_USER}
+      POSTGRES_USER: postgres
       POSTGRES_PASSWORD: ${SHARED_DB_PASSWORD}
-      POSTGRES_DB: ${SHARED_DB_DB}  # Default database
+      POSTGRES_DB: postgres
       POSTGRES_INITDB_ARGS: '--encoding=UTF-8 --locale=C --data-checksums'
     volumes:
       - ${SHARED_DB_DATA_DIR}:/var/lib/postgresql/data