Fix FATAL: role "postgres" does not exists for docker compose deplo…

…yment (#8240)

* update pg_isready args to database configuration

* update changelog

CHANGELOG.unreleased.md

@@ -36,6 +36,7 @@ For upgrade instructions, please check the [migration guide](MIGRATIONS.released
 - Fixed a bug where trying to delete a non-existing node (via the API, for example) would delete the whole active tree. [#8176](https://github.com/scalableminds/webknossos/pull/8176)
 - Fixed a bug where dataset uploads would fail if the organization directory on disk is missing. [#8230](https://github.com/scalableminds/webknossos/pull/8230)
 - Fixed some layout issues in the upload view. [#8231](https://github.com/scalableminds/webknossos/pull/8231)
+- Fixed `FATAL: role "postgres" does not exist` error message in Docker compose. [#8240](https://github.com/scalableminds/webknossos/pull/8240)
 
 ### Removed
 - Removed support for HTTP API versions 3 and 4. [#8075](https://github.com/scalableminds/webknossos/pull/8075)

docker-compose.yml

@@ -222,7 +222,7 @@ services:
       POSTGRES_USER: webknossos_user
       POSTGRES_PASSWORD: secret_password
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres -h 127.0.0.1 -p 5432"]
+      test: ["CMD-SHELL", "pg_isready -d webknossos -U webknossos_user -h 127.0.0.1 -p 5432"]
       interval: 2s
       timeout: 5s
       retries: 30