Add some predefined task templates for development

Closes #7 (closed)

@tziai @valerii.kalashnikov

env/task.env

@@ -2,4 +2,7 @@ HTTP_HOST=""
 HTTP_PORT="8080"
 HTTP_IDLE_TIMEOUT="120s"
 HTTP_READ_TIMEOUT="10s"
-HTTP_WRITE_TIMEOUT="10s"
\ No newline at end of file
+HTTP_WRITE_TIMEOUT="10s"
+MONGO_ADDR="mongodb://mongo:27017/task?authSource=admin"
+MONGO_USER="root"
+MONGO_PASS="root"