move analytics id to environment variable (#238)

.env.example

@@ -3,3 +3,4 @@ GATSBY_NETWORK="rinkeby"
 
 #GATSBY_INFURA_PROJECT_ID="xxx"
 #GATSBY_MARKET_FEE_ADDRESS="0xxx"
+#GATSBY_ANALYTICS_ID="xxx"

app.config.js

@@ -32,5 +32,8 @@ module.exports = {
     classNameDark: 'dark',
     classNameLight: 'light',
     storageKey: 'oceanDarkMode'
-  }
+  },
+
+  // Analytics
+  analyticsId: process.env.GATSBY_ANALYTICS_ID || 'xxx'
 }

gatsby-config.js

@@ -71,7 +71,7 @@ module.exports = {
       resolve: 'gatsby-plugin-google-analytics',
       options: {
         // The property ID; the tracking code won't be generated without it
-        trackingId: 'UA-60614729-11',
+        trackingId: appConfig.analyticsId,
         // Defines where to place the tracking script - `true` in the head and `false` in the body
         head: false,
         // Setting this parameter is optional

src/hooks/useSiteMetadata.ts

@@ -19,6 +19,7 @@ const query = graphql`
           network
           marketFeeAddress
           currencies
+          analyticsId
         }
       }
     }