Add database

.gitignore

@@ -1,2 +1,3 @@
 target
 chat.db
+chat.db*

db.env

@@ -0,0 +1 @@
+export DATABASE_URL="sqlite:chat.db"

migrations/0001_user_table.sql

@@ -0,0 +1,7 @@
+create table users (
+  -- id INT NOT NULL AUTO_INCREMENT,
+  username VARCHAR NOT NULL UNIQUE,
+  password TEXT NOT NULL,
+  admin BOOLEAN NOT NULL DEFAULT FALSE,
+  PRIMARY KEY (username)
+);