refac: remove frontend & clearer DDD

.env.example

@@ -5,6 +5,7 @@ JWT_SECRET=abc123
 CORS_ALLOWED_ORIGINS=*
 DB_FILE=./renewcms.db
 DOCKER_DB_FOLDER=./data
+UPLOAD_DIR=./api/static/uploadedImages/
 SMTP_EMAIL=a@b.c
 SMTP_PASSWORD=12341234
 SMTP_HOST=mail.service.abc