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)

.sequelizerc

@@ -1,4 +1,6 @@
-require('dotenv').config({ silent: true });
+require("dotenv").config({
+  path: process.env.NODE_ENV === "test" ? ".env.test" : ".env",
+});
 
 var path = require('path');
 
@@ -6,5 +8,4 @@ module.exports = {
   'config': path.resolve('server/config', 'database.json'),
   'migrations-path': path.resolve('server', 'migrations'),
   'models-path': path.resolve('server', 'models'),
-  'seeders-path': path.resolve('server/models', 'fixtures'),
 }