server: project config and infrastructure setup

Add package.json (Fastify, Prisma, Redis, JWT), TypeScript config,
Dockerfile, docker-compose with Postgres and Redis services, and
.gitignore with data directory rules.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/.dockerignore

@@ -0,0 +1,7 @@
+node_modules
+dist
+data
+.env
+.git
+.gitignore
+README.md