Use Azure app service editor

1. make code change in the online editor

Your code changes go live as the code changes are saved.

Use Visual Studio Code

Build and debug

1. download source code zip and extract source in local folder
2. open the source folder in Visual Studio Code
3. make code changes
4. download and run botframework-emulator
5. connect the emulator to http://localhost:3987

Publish back

npm run azure-publish

Use continuous integration

If you have setup continuous integration, then your bot will automatically deployed when new changes are pushed to the source repository.