The following tools should be installed.
- Make sure that the all required tools are installed.
- Use visual studio to open solution
Microsoft.Teams.Samples.TaskModule.slnand run it(default with port 3333). - Open ngrok terminal and run
ngrok.exe http 3333 -host-header="localhost:3333", copy https host
- Update web.config file accordingly

- Use App Studio to configure tab, bot, message extension.

- Install application in App Studio

- Select feature to install(eg. Tab) and configure

- Check installed tab

- Create Item(open task module in tab)

- Search items in message extension and send it to team members

- Update item(click button "Update this item" to open update modal)

Note: you can create a bot by following this link, or in App Studio.