Add build identifier meta tags (#168)

Author: oredavids

config/custom-environment-variables.yaml

@@ -1,6 +1,11 @@
 # This file allows us to define custom environment variables that can be used to override parts of the config. This
 # provides a convenient mechanism for specifying different config values in different environments.
 
+# App-wide settings
+app:
+  # The SHA1 of the commit which resulted in this application
+  buildVersion: CIRCLE_SHA1
+
 # Google Analytics tracking config
 googleAnalytics:
   trackingID: CONFIG_GOOGLE_ANALYTICS_TRACKING_ID

docusaurus.config.js

@@ -24,6 +24,10 @@ const siteUrl = cfg.has("siteUrl")
   ? process.env["DEPLOY_URL"]
   : "http://localhost:3000"
 
+const buildVersion = cfg.has("app.buildVersion")
+  ? cfg.get("app.buildVersion")
+  : "N/A"
+
 const plugins = ["plugin-image-zoom"]
 
 if (enablePosthog) {
@@ -257,6 +261,10 @@ const config = {
             appUrl: posthogConfig.appUrl,
           }
         : undefined,
+      metadata: [
+        { name: "buildVersion", content: buildVersion },
+        { name: "buildTime", content: new Date().toString() },
+      ],
     }),
 }