<Context docBase="appstore-api" path="/appstore-api" reloadable="true" source="org.eclipse.jst.jee.server:appstore-api">
      <Resource auth="Container" driverClassName="org.postgresql.Driver" maxIdle="10" maxTotal="20" maxWaitMillis="-1" name="jdbc/postgres" password="password" type="javax.sql.DataSource" url="jdbc:postgresql://localhost:5432/appstore" username="postgres"/>
      </Context>

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.1</version>
</dependency>