Bsky short link service (#4542)

* bskylink: scaffold service w/ initial config and schema

* bskylink: implement link creation and redirects

* bskylink: tidy

* bskylink: tests

* bskylink: tidy, add error handler

* bskylink: add dockerfile

* bskylink: add build

* bskylink: fix some express plumbing

* bskyweb: proxy fallthrough routes to link service redirects

* bskyweb: build w/ link proxy

* Add AASA to bskylink (#4588)

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Co-authored-by: Hailey <me@haileyok.com>

bskylink/src/db/migrations/001-init.ts

@@ -0,0 +1,15 @@
+import {Kysely} from 'kysely'
+
+export async function up(db: Kysely<unknown>): Promise<void> {
+  await db.schema
+    .createTable('link')
+    .addColumn('id', 'varchar', col => col.primaryKey())
+    .addColumn('type', 'smallint', col => col.notNull()) // integer enum: 1->starterpack
+    .addColumn('path', 'varchar', col => col.notNull())
+    .addUniqueConstraint('link_path_unique', ['path'])
+    .execute()
+}
+
+export async function down(db: Kysely<unknown>): Promise<void> {
+  await db.schema.dropTable('link').execute()
+}

bskylink/src/db/migrations/index.ts

@@ -0,0 +1,5 @@
+import * as init from './001-init.js'
+
+export default {
+  '001': init,
+}

bskylink/src/db/migrations/provider.ts

@@ -0,0 +1,8 @@
+import {Migration, MigrationProvider} from 'kysely'
+
+export class DbMigrationProvider implements MigrationProvider {
+  constructor(private migrations: Record<string, Migration>) {}
+  async getMigrations(): Promise<Record<string, Migration>> {
+    return this.migrations
+  }
+}