Migrate backend from Go to Quarkus (Java 21 / JAX-RS)

- Replaced Go stdlib server with Quarkus (RESTEasy Reactive + Jackson)
- 7 Java classes: Game POJO, GameService (JSON file I/O), 4 REST resources, static file serving
- Same JSON-per-game storage, same ZIP upload + bundle creation
- Same Svelte frontend (unchanged), built into the JAR via maven-resources-plugin
- Multi-stage Dockerfile: Node → Maven → JRE runtime

README.md

@@ -1,34 +1,44 @@
-# Dostalgia
+# Dostalgia — Quarkus Edition
 
-A nostalgic DOS game hub — upload, scrape artwork, and play classic DOS games directly in the browser via js-dos.
+A nostalgic DOS game hub. Upload your old DOS games, scrape artwork, and play them directly in the browser via js-dos (WebAssembly DOSBox).
 
-## Quick Start (Docker)
+## Quick Start
 
 ```bash
+# Build and run with Docker
 docker build -t dostalgia .
 docker run -p 8765:8765 -v $(pwd)/data:/data dostalgia
 ```
 
-## Development
+Open http://localhost:8765
 
-Terminal 1 — Go API:
-```bash
-DOSTALGIA_DEV=1 go run .
-```
+## Development (without Docker)
 
-Terminal 2 — Frontend dev server:
+Terminal 1 — Frontend dev server:
 ```bash
 cd frontend && npm install && npm run dev
 ```
 
-Open http://localhost:5173
+Terminal 2 — Quarkus dev server:
+```bash
+mvn quarkus:dev
+```
+
+Open http://localhost:5173 (Vite proxies API calls to Quarkus on port 8765)
+
+### Production build (local)
+```bash
+cd frontend && npm install && npm run build
+mvn package -DskipTests
+java -jar target/quarkus-app/quarkus-run.jar
+```
 
 ## Architecture
 
-- **Backend**: Single Go binary. No database — each game is a directory with a `game.json` file.
-- **Frontend**: Svelte SPA, embedded in the Go binary at build time.
-- **Emulation**: js-dos v8 loaded from CDN, runs DOSBox in WebAssembly.
-- **Storage**: `/data/games/{id}/` — contains `game.json`, `.jsdos` bundle, and cover art.
+- **Backend**: Quarkus (Java 21, JAX-RS) — ~5 REST resource classes, zero database
+- **Frontend**: Svelte 5 SPA with hash-based routing
+- **Emulation**: js-dos v8 loaded from CDN, runs DOSBox in WebAssembly
+- **Storage**: JSON-per-game under `/data/games/{id}/game.json`
 
 ## API
 
@@ -51,8 +61,6 @@ Open http://localhost:5173
   "year": 1993,
   "genre": "FPS",
   "developer": "id Software",
-  "publisher": "id Software",
-  "description": "The iconic first-person shooter...",
   "bundle_type": "standard",
   "bundle_file": "doom.jsdos",
   "has_cover": true,