Better error message on postgresql connection err

server/initializers/database.ts

@@ -75,6 +75,14 @@ const sequelizeTypescript = new SequelizeTypescript({
   }
 })
 
+sequelizeTypescript.authenticate()
+  .then(() => logger.debug('Connection to PostgreSQL has been established successfully.'))
+  .catch(err => {
+
+    logger.error('Unable to connect to PostgreSQL database.', { err })
+    process.exit(-1)
+  })
+
 async function initDatabaseModels (silent: boolean) {
   sequelizeTypescript.addModels([
     ApplicationModel,