feat: add Dockerfiles and MySQL TypeORM wiring for center/guild backends

Fabric.Backend.Guild/src/database.config.ts

@@ -0,0 +1,16 @@
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+import { Guild } from './entities/guild.entity';
+import { Channel } from './entities/channel.entity';
+import { Message } from './entities/message.entity';
+
+export const buildTypeOrmConfig = (): TypeOrmModuleOptions => ({
+  type: 'mysql',
+  host: process.env.DB_HOST ?? 'mysql-guild',
+  port: Number(process.env.DB_PORT ?? 3306),
+  username: process.env.DB_USER ?? 'fabric',
+  password: process.env.DB_PASSWORD ?? 'fabric',
+  database: process.env.DB_NAME ?? 'fabric_guild',
+  entities: [Guild, Channel, Message],
+  synchronize: (process.env.DB_SYNC ?? 'true') === 'true',
+  logging: (process.env.DB_LOGGING ?? 'false') === 'true',
+});