Feature/sqnc 54 (#544)

* SQNC-534: addingh express-prom-bundle package along with middleware.

* SQNC-54: rebase and version increase.

* SQNC-54: linting.

* SQNC-54: remove function from promBundle.

* SQNC-54: downgrade prom-bundle to v7.

* SQNC-54: version bump.

* SQNC-54: moving promBundle to the variable.

package.json

@@ -83,6 +83,7 @@
     "dotenv": "^16.4.7",
     "envalid": "^8.0.0",
     "express": "^4.21.2",
+    "express-prom-bundle": "^7.0.0",
     "knex": "^3.1.0",
     "moment": "^2.30.1",
     "multer": "^1.4.5-lts.1",

src/server.ts

@@ -2,6 +2,7 @@ import express, { Express } from 'express'
 import { setup, serve, SwaggerUiOptions } from 'swagger-ui-express'
 import cors from 'cors'
 import bodyParser from 'body-parser'
+import promBundle from 'express-prom-bundle'
 
 import { errorHandler } from './lib/error-handler/index.js'
 import { RegisterRoutes } from './routes.js'
@@ -24,6 +25,14 @@ const customCssToInject: string = `
   .swagger-ui section.models { background-color: #f7f7f7; }
 
 `
+const promClient = promBundle({
+  includePath: true,
+  promClient: {
+    collectDefaultMetrics: {
+      prefix: 'sqnc_matchmaker_api_',
+    },
+  },
+})
 
 export default async (): Promise<Express> => {
   const app: Express = express()
@@ -37,6 +46,8 @@ export default async (): Promise<Express> => {
   app.use(bodyParser.urlencoded({ extended: true }))
   app.use(bodyParser.json())
   app.use(cors())
+  app.use(promClient)
+
   app.use((req, _, next) => {
     // make sure we always have a file object on req even if this is not a multipart
     // body this is so that the attachment route can handle both JSON and multipart bodies