Add NestJS fabric trade API with Prisma and Docker

Provide backend for admin and user apps with Postgres, migrations, seed data, and docker-compose for LiteSpeed reverse-proxy deployment.

Co-authored-by: Cursor <cursoragent@cursor.com>

nest-cli.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}