Upload 4.2

part4/bloglist/index.js

@@ -0,0 +1,7 @@
+const app = require('./app') // the actual Express application
+const config = require('./utils/config')
+const logger = require('./utils/logger')
+
+app.listen(config.PORT, () => {
+  logger.info(`Server running on port ${config.PORT}`)
+})