[mirotalk] - add Slack integration

.env.template

@@ -35,5 +35,14 @@ SENTRY_ENABLED=true|false
 SENTRY_DSN=YourClientKeyDSN
 SENTRY_TRACES_SAMPLE_RATE=1.0
 
+# Slack Integration (optional)
+# 1. Goto https://api.slack.com/apps/
+# 2. Create your app
+# 3. On Settings - Basic Information - App Credentials chose your Signing Secret
+# 4. Create a Slash Commands and put as Request URL: https://your.domain.name/slack
+
+SLACK_ENABLED=true|false
+SLACK_SIGNING_SECRET=YourSlackSigningSecret
+
 # Auto deploy on Railway
 # https://railway.app/new/template/mirotalk?referralCode=mirotalk