Separate environment configs (#6597)

* Separate environment configs

* wip

* wip

* test

* plugins

* test

* test

* .sequelizerc, unfortunately can't go through /utils/environment due to not supporting TS

* docker-compose -> docker compose

* fix: .local wipes .development

* Add custom validation message for invalid SECRET_KEY (often confused)

server/config/database.json

@@ -4,7 +4,7 @@
     "dialect": "postgres"
   },
   "test": {
-    "use_env_variable": "DATABASE_URL_TEST",
+    "use_env_variable": "DATABASE_URL",
     "dialect": "postgres"
   },
   "production": {
@@ -20,4 +20,4 @@
     "use_env_variable": "DATABASE_URL",
     "dialect": "postgres"
   }
-}
+}