Authorize dockerhub calls to get access to private repos

Dockerfile

@@ -5,6 +5,9 @@ WORKDIR /usr/src/app
 ENV CHECK_INTERVAL_MINUTES 5
 ENV DEBUG ""
 ENV TZ "Europe/Helsinki"
+ENV DOCKER_USER
+ENV DOCKER_AUTH
+
 RUN apk add --update \
     python3 \
     build-base \

src/dockerRepo.js

@@ -1,21 +1,46 @@
 const debug = require('debug')('digitransit-deployer-repo')
 
+const loginRequest = `{
+  "username": "${process.env.DOCKER_USER}",
+  "password": "${process.env.DOCKER_AUTH}"
+}`
+
 module.exports = {
   getImageDate: (repoAndRef) => {
-    const [repository, tag] = repoAndRef.split(':')
-    const url = `https://hub.docker.com/v2/repositories/${repository}/tags/${tag || 'latest'}`
-    return fetch(url).then(res => {
+    const [image, tag] = repoAndRef.split(':')
+    const [namespace, repository] = image.split('/')
+    const url = `https://hub.docker.com/v2/namespaces/${namespace}/repositories/${repository}/tags/${tag || 'latest'}`
+    const tokenUrl = 'https://hub.docker.com/v2/users/login/'
+
+    return fetch(tokenUrl, {
+      method: 'POST',
+      headers: {
+	'Content-Type': 'application/json'
+      },
+      body: loginRequest
+    }).then(res => {
+      if (res.ok) {
+	return res.json()
+      } else {
+	debug(`failed to get access token from docker hub`)
+      }
+    }).then(body => {
+      const token = body?.token
+      return fetch(url, {
+	headers: {
+	  'Content-Type': 'application/json',
+	  'Authorization': `JWT ${token}`
+	}})
+    }).then(res => {
       if (res.ok) {
         return res.json()
       } else {
-        debug(`failed to fetch data for ${repoAndRef} from docker hub`)
+        console.log(`failed to fetch data for ${repoAndRef} from docker hub`)
       }
+    }).then(data => {
+      return data && Date.parse(data.last_updated)
+    }).catch(err => {
+      debug(err)
     })
-      .then(data => {
-        return Date.parse(data.last_updated)
-      })
-      .catch(err => {
-        debug(err)
-      })
   }
 }