Add metrics to redirect service (#10112)

bskylink/src/context.ts

@@ -1,6 +1,7 @@
 import {SafelinkClient} from './cache/safelinkClient.js'
 import {type Config} from './config.js'
 import Database from './db/index.js'
+import {MetricsClient} from './metrics.js'
 
 export type AppContextOptions = {
   cfg: Config
@@ -12,6 +13,7 @@ export class AppContext {
   db: Database
   safelinkClient: SafelinkClient
   abortController = new AbortController()
+  metrics: MetricsClient
 
   constructor(private opts: AppContextOptions) {
     this.cfg = this.opts.cfg
@@ -20,6 +22,9 @@ export class AppContext {
       cfg: this.opts.cfg.service,
       db: this.opts.db,
     })
+    this.metrics = new MetricsClient({
+      trackingEndpoint: this.opts.cfg.service.metricsApiHost,
+    })
   }
 
   static async fromConfig(cfg: Config, overrides?: Partial<AppContextOptions>) {