feat: add seeding

This allows us to get a pre-populated database to develop new functionality

Signed-off-by: Philip Molares <philip.molares@udo.edu>

backend/src/database/seeds/01_user.ts

@@ -0,0 +1,48 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Knex } from 'knex';
+
+import { ProviderType } from '../../auth/provider-type.enum';
+import { hashPassword } from '../../utils/password';
+import {
+  FieldNameIdentity,
+  FieldNameUser,
+  TableIdentity,
+  TableUser,
+} from '../types';
+
+export async function seed(knex: Knex): Promise<void> {
+  // Clear tables beforehand
+  await knex(TableUser).del();
+  await knex(TableIdentity).del();
+
+  // Insert user accounts and identities
+  await knex(TableUser).insert([
+    {
+      [FieldNameUser.username]: null,
+      [FieldNameUser.guestUuid]: '55b4618a-d5f3-4320-93d3-f3501c73d72b',
+      [FieldNameUser.displayName]: null,
+      [FieldNameUser.photoUrl]: null,
+      [FieldNameUser.email]: null,
+      [FieldNameUser.authorStyle]: 1,
+    },
+    {
+      [FieldNameUser.username]: 'test',
+      [FieldNameUser.guestUuid]: null,
+      [FieldNameUser.displayName]: 'Local Test User',
+      [FieldNameUser.photoUrl]: null,
+      [FieldNameUser.email]: null,
+      [FieldNameUser.authorStyle]: 2,
+    },
+  ]);
+  await knex(TableIdentity).insert({
+    [FieldNameIdentity.userId]: 2,
+    [FieldNameIdentity.providerType]: ProviderType.LOCAL,
+    [FieldNameIdentity.providerIdentifier]: null,
+    [FieldNameIdentity.providerUserId]: null,
+    [FieldNameIdentity.passwordHash]: await hashPassword('test123'),
+  });
+}