replace python django backend with nodejs backend

.gitignore

@@ -1,8 +1,13 @@
 .idea/
 
-/frontend/node_modules
+node_modules/
 /frontend/dev-dist
 /frontend/dist
 /backend/db.sqlite3
 /conversations
 /models
+/backend/config/config.dev.json
+/backend/config/config.prod.json
+/backend/dev/
+/backend/dist/
+/oas/