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)

.env.development

@@ -0,0 +1,10 @@
+URL=https://local.outline.dev:3000
+
+SMTP_FROM_EMAIL=hello@example.com
+
+# Enable unsafe-inline in script-src CSP directive
+# Setting it to true allows React dev tools add-on in Firefox to successfully detect the project
+DEVELOPMENT_UNSAFE_INLINE_CSP=true
+
+# Increase the log level to debug for development
+LOG_LEVEL=debug