add config option for webcompat reporter API endpoint

lib/config.js

@@ -58,6 +58,7 @@ const Config = function () {
   this.braveServicesKey = getNPMConfig(['brave_services_key']) || ''
   this.infuraProjectId = getNPMConfig(['brave_infura_project_id']) || ''
   this.safeBrowsingApiEndpoint = getNPMConfig(['safe_browsing_api_endpoint']) || 'safebrowsing.brave.com'
+  this.webcompatReportApiEndpoint = getNPMConfig(['webcompat_report_api_endpoint']) || 'https://webcompat.brave.com/1/webcompat'
   this.buildProjects()
   this.braveVersion = getNPMConfig(['version']) || '0.0.0.0'
   this.chromeVersion = getNPMConfig(['projects', 'chrome', 'tag']) || '0.0.0.0'
@@ -124,6 +125,7 @@ Config.prototype.buildArgs = function () {
     chrome_version_string: this.chromeVersion,
     chrome_version_major: chrome_version_parts[0],
     safebrowsing_api_endpoint: this.safeBrowsingApiEndpoint,
+    webcompat_report_api_endpoint: this.webcompatReportApiEndpoint,
     brave_referrals_api_key: this.braveReferralsApiKey,
     enable_hangout_services_extension: this.enable_hangout_services_extension,
     enable_cdm_host_verification: this.brave_enable_cdm_host_verification,
@@ -385,6 +387,10 @@ Config.prototype.update = function (options) {
     this.safeBrowsingApiEndpoint = options.safebrowsing_api_endpoint
   }
 
+  if (options.webcompat_report_api_endpoint) {
+    this.webcompatReportApiEndpoint = options.webcompat_report_api_endpoint
+  }
+
   if (options.brave_referrals_api_key) {
     this.braveReferralsApiKey = options.brave_referrals_api_key
   }