java/command/1-startdirectory contains a simple application, which you will modify to support Slack slash commands.
https://YOUR_PROJECT.appspot.com/helloas your request URL, replacing
slack-tokenin the runtime configuration. Use the Cloud SDK from the command-line to add the variable:
YOUR-TOKEN-VALUEwith the verification token value you copied from the Slack app management page.
/greetin your Slack team.
Hello, world.in response.