Add initialization command to setup new apps

hello/config/migrations/100_init.sql

@@ -0,0 +1,21 @@
+-- Write your migrate up statements here
+
+CREATE DATABASE hello_database
+
+-- CREATE TABLE public.users (
+--   id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+--   full_name   text
+--   email       text UNIQUE NOT NULL CHECK (length(email) < 255),
+--   encrypted_password text,
+--   created_at timestamptz NOT NULL NOT NULL DEFAULT NOW(),
+--   updated_at timestamptz NOT NULL NOT NULL DEFAULT NOW()
+-- );
+
+---- create above / drop below ----
+
+-- Write your migrate down statements here. If this migration is irreversible
+-- Then delete the separator line above.
+
+-- DROP TABLE public.users
+
+DROP DATABASE IF EXISTS hello_database