ci: add test configuration for the e2e test and example

.github/workflows/example-basic.yml

@@ -14,5 +14,9 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
+      - name: ls
+        run: npm ci
       - name: Renovate
         uses: ./
+        with:
+          configurationFile: 'test/config.js'

test/config.js

@@ -0,0 +1,8 @@
+module.exports = {
+  platform: 'github',
+  logFileLevel: 'warn',
+  logLevel: 'debug',
+  onboarding: false,
+  dryRun: true,
+  gitAuthor: 'Renovate Bot <bot@renovateapp.com>',
+};