Add password reset service

migrations/00003_password_reset.sql

@@ -0,0 +1,14 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE password_resets (
+  id SERIAL PRIMARY KEY,
+  user_id INT UNIQUE REFERENCES users (id) ON DELETE CASCADE,
+  token_hash TEXT UNIQUE NOT NULL,
+  expires_at TIMESTAMPTZ NOT NULL
+);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE password_resets;
+-- +goose StatementEnd