Add .env.example

.env.example

@@ -0,0 +1,12 @@
+# The ID of your GitHub App
+APP_ID=8374
+WEBHOOK_SECRET=development
+
+# Uncomment this to get verbose logging
+# LOG_LEVEL=trace # or `info` to show less
+
+# Go to https://smee.io/new set this to the URL that you are redirected to.
+WEBHOOK_PROXY_URL=https://smee.io/ZyQCjZTDPT3pd4SD
+
+# The "Bot User OAuth Access Token" of your Slack App
+SLACK_BOT_TOKEN=