Add a dedicated GQL server for metadata available on /meta (#1820)

server/src/metadata/metadata.datasource.ts

@@ -0,0 +1,25 @@
+import { ConfigService } from '@nestjs/config';
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+
+import { DataSource, DataSourceOptions } from 'typeorm';
+import { config } from 'dotenv';
+
+config();
+
+const configService = new ConfigService();
+
+export const typeORMMetadataModuleOptions: TypeOrmModuleOptions = {
+  url: configService.get<string>('PG_DATABASE_URL'),
+  type: 'postgres',
+  logging: false,
+  schema: 'metadata',
+  entities: [__dirname + '/**/*.entity{.ts,.js}'],
+  synchronize: false,
+  migrationsRun: true,
+  migrationsTableName: '_typeorm_migrations',
+  migrations: [__dirname + '/migrations/**/*{.ts,.js}'],
+};
+
+export const connectionSource = new DataSource(
+  typeORMMetadataModuleOptions as DataSourceOptions,
+);