init project, impl authorization

backend/migrations/20220601131817_create_account.sql

@@ -0,0 +1,9 @@
+-- Add migration script here
+CREATE TABLE account
+(
+    id            uuid primary key,
+    username      varchar(128) unique not null,
+    password_hash bytea               not null,
+    password_salt varchar(32)         not null,
+    email         text                null
+);