add heroku deplyment

Author: rwieruch

server/src/index.js

@@ -72,15 +72,17 @@ server.applyMiddleware({ app, path: '/graphql' });
 const httpServer = http.createServer(app);
 server.installSubscriptionHandlers(httpServer);
 
-const eraseDatabaseOnSync = process.env.TEST_DATABASE ? true : false;
+const isTest = !!process.env.TEST_DATABASE;
+const isProduction = !!process.env.DATABASE_URL;
+const port = process.env.PORT || 8000;
 
-sequelize.sync({ force: eraseDatabaseOnSync }).then(async () => {
-  if (eraseDatabaseOnSync) {
+sequelize.sync({ force: isTest || isProduction }).then(async () => {
+  if (isTest || isProduction) {
     createUsersWithMessages(new Date());
   }
 
-  httpServer.listen({ port: 8000 }, () => {
-    console.log('Apollo Server on http://localhost:8000/graphql');
+  httpServer.listen({ port }, () => {
+    console.log(`Apollo Server on http://localhost:${port}/graphql`);
   });
 });
 

server/src/models/index.js

@@ -1,13 +1,20 @@
 import Sequelize from 'sequelize';
 
-const sequelize = new Sequelize(
-  process.env.TEST_DATABASE || process.env.DATABASE,
-  process.env.DATABASE_USER,
-  process.env.DATABASE_PASSWORD,
-  {
+let sequelize;
+if (process.env.DATABASE_URL) {
+  sequelize = new Sequelize(process.env.DATABASE_URL, {
     dialect: 'postgres',
-  },
-);
+  });
+} else {
+  sequelize = new Sequelize(
+    process.env.TEST_DATABASE || process.env.DATABASE,
+    process.env.DATABASE_USER,
+    process.env.DATABASE_PASSWORD,
+    {
+      dialect: 'postgres',
+    },
+  );
+}
 
 const models = {
   User: sequelize.import('./user'),