Invalid webhookName when deploying to app service

[ejizba]

Saw this error popping up in telemetry and tried to repro myself. This is what I came up with

Repro steps:

1. Right click on a registry image -> Deploy image to azure app service
2. Enter a web app name with a hyphen and/or greater than 50 characters
3. Fill out the rest of the steps and wait for deployment to finish

Action: vscode-docker.registries.deployImageToAzure
Error type: Error
Error Message: "webhookName" should satisfy the constraint - "Pattern": /^[a-zA-Z0-9]*$/

Version: 0.8.0
OS: darwin
Product: Visual Studio Code - Insiders
Product Version: 1.39.0-insider
Language: en

Call Stack

Webhooks.f [as _beginCreate] extension.bundle.js:332:206660
Webhooks.beginCreate extension.bundle.js:332:224292
Webhooks.a [as _create] extension.bundle.js:332:189966
module.exports.e.exports.create.Promise extension.bundle.js:332:221705
Webhooks.create extension.bundle.js:332:221683
DockerWebhookCreateStep.createWebhookForApp extension.bundle.js:332:296664
process._tickCallback next_tick.js:68:7