Add first version of server

Signed-off-by: Marcel Müller <neikos@neikos.email>

nixie-server/migrations/20260112065245_create_users.sql

@@ -0,0 +1,8 @@
+-- Add migration script here
+
+CREATE TABLE IF NOT EXISTS users
+(
+    id INTEGER PRIMARY KEY NOT NULL,
+    username TEXT NOT NULL UNIQUE,
+    password TEXT NOT NULL
+);