Enable persistence of the task data

Enable h2 database
  Create initial evolution for tasks table

conf/application.conf

@@ -33,8 +33,8 @@ application.langs="en"
 # You can declare as many datasources as you want.
 # By convention, the default datasource is named `default`
 #
-# db.default.driver=org.h2.Driver
-# db.default.url="jdbc:h2:mem:play"
+db.default.driver=org.h2.Driver
+db.default.url="jdbc:h2:mem:play"
 # db.default.user=sa
 # db.default.password=""
 

conf/evolutions/default/1.sql

@@ -0,0 +1,14 @@
+# Tasks schema
+
+# --- !Ups
+
+CREATE SEQUENCE task_id_seq;
+CREATE TABLE task (
+  id integer NOT NULL DEFAULT nextval('task_id_seq'),
+  label varchar(255)
+);
+
+# --- !Downs
+
+DROP TABLE task;
+DROP SEQUENCE task_id_seq;