fix migrations and add to docker build

Dockerfile

@@ -2,5 +2,6 @@ FROM node:10.24.1-alpine3.11
 WORKDIR /app
 COPY . .
 RUN npm install
+RUN npm run migrate
 EXPOSE 8080
 CMD [ "node", "./server" ]

knexfile.js

@@ -1,22 +1,10 @@
 var dotenv = require('dotenv');
-dotenv.config(); 
-
+dotenv.config();
 
 module.exports = {
-
-  development: {
-    client: 'postgresql',
-    connection: process.env.DATABASE_URL,    
-  },
-  production: {
-    client: 'postgresql',
-    connection: process.env.DATABASE_URL,
-    pool: {
-      min: 2,
-      max: 10
-    },
-    migrations: {
-      tableName: 'knex_migrations'
-    }
-  }
+  client: 'pg',
+  connection: process.env.DATABASE_URL,
+  migrations: {
+    tableName: 'knex_migrations'
+  }  
 };