(core) move home server into core

Summary: This moves enough server material into core to run a home server.  The data engine is not yet incorporated (though in manual testing it works when ported).

Test Plan: existing tests pass

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2552

app/gen-server/migration/1549313797109-PinDocs.ts

@@ -0,0 +1,17 @@
+import {MigrationInterface, QueryRunner, TableColumn} from "typeorm";
+
+export class PinDocs1549313797109 implements MigrationInterface {
+
+  public async up(queryRunner: QueryRunner): Promise<any> {
+    const sqlite = queryRunner.connection.driver.options.type === 'sqlite';
+    await queryRunner.addColumn('docs', new TableColumn({
+      name: 'is_pinned',
+      type: 'boolean',
+      default: sqlite ? 0 : false
+    }));
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<any> {
+    await queryRunner.dropColumn('docs', 'is_pinned');
+  }
+}