Fix API compatibility and add user/role/permission and asset import/export

.gitignore

@@ -0,0 +1,23 @@
+# Secrets
+.db_password
+.redis_password
+
+# Runtime data
+postgres/
+redis/
+backend/uploads/
+backend/logs/
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.pytest_cache/
+.mypy_cache/
+
+# Node
+node_modules/
+
+# OS
+.DS_Store