Initial commit: Dostalgia — DOS game hub

- Go backend (single binary) with embedded Svelte frontend
- JSON-per-game storage (no database)
- .jsdos bundle creation on upload
- Dark phosphor-green theme (#33FF33)
- js-dos v8 emulator integration
- Sockdrive support for games >80MB
- IGDB placeholder for future artwork scraping
- Docker deployment ready

Dockerfile

@@ -0,0 +1,28 @@
+# Dostalgia — Dockerized DOS game hub
+
+# ─── Build frontend ───────────────────────────────
+FROM node:20-alpine AS frontend-builder
+WORKDIR /src
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm ci 2>/dev/null || npm install
+COPY frontend/ ./
+RUN npm run build
+
+# ─── Build Go binary ─────────────────────────────
+FROM golang:1.23-alpine AS go-builder
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN go mod download 2>/dev/null || true
+COPY *.go ./
+COPY --from=frontend-builder /src/dist ./frontend/dist/
+RUN CGO_ENABLED=0 go build -o /dostalgia .
+
+# ─── Runtime ─────────────────────────────────────
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata
+COPY --from=go-builder /dostalgia /dostalgia
+VOLUME /data
+EXPOSE 8765
+ENV DOSTALGIA_DATA=/data
+ENV PORT=8765
+ENTRYPOINT ["/dostalgia"]