Round out webhookKey support in cli, docs, and Config (#1936)

src/Config.js

@@ -28,6 +28,7 @@ export class Config {
     this.javascriptKey = cacheInfo.javascriptKey;
     this.dotNetKey = cacheInfo.dotNetKey;
     this.restAPIKey = cacheInfo.restAPIKey;
+    this.webhookKey = cacheInfo.webhookKey;
     this.fileKey = cacheInfo.fileKey;
     this.facebookAppIds = cacheInfo.facebookAppIds;
     this.allowClientClassCreation = cacheInfo.allowClientClassCreation;

src/ParseServer.js

@@ -76,6 +76,7 @@ addParseCloud();
 // "clientKey": optional key from Parse dashboard
 // "dotNetKey": optional key from Parse dashboard
 // "restAPIKey": optional key from Parse dashboard
+// "webhookKey": optional key from Parse dashboard
 // "javascriptKey": optional key from Parse dashboard
 // "push": optional key from configure push
 // "sessionLength": optional length in seconds for how long Sessions should be valid for

src/cli/cli-definitions.js

@@ -86,6 +86,10 @@ export default {
     env: "PARSE_SERVER_DOT_NET_KEY",
     help: "Key for Unity and .Net SDK"
   },
+  "webhookKey": {
+    env: "PARSE_SERVER_WEBHOOK_KEY",
+    help: "Key sent with outgoing webhook calls"
+  },
   "cloud": {
     env: "PARSE_SERVER_CLOUD_CODE_MAIN",
     help: "Full path to your cloud code main.js"