feat: webowa wersja Video & Sound Downloader Pro (NestJS + React)

Odwzorowanie desktopowego v6.5.6: tryby MP3/MP4/PLAYLISTA/FACEBOOK,
jakość/format, napisy, log na żywo (SSE), STOP. Docker + Gitea CI/CD,
deploy na videodownloader.naurecki.pl.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/api/Dockerfile

@@ -0,0 +1,27 @@
+# --- build: kompilacja TypeScript ---
+FROM node:20-bookworm-slim AS build
+WORKDIR /app
+COPY apps/api/package.json ./
+RUN npm install
+COPY apps/api/ ./
+RUN npm run build && npm prune --omit=dev
+
+# --- runtime: node + ffmpeg + yt-dlp (standalone) ---
+FROM node:20-bookworm-slim AS runtime
+WORKDIR /app
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends ffmpeg ca-certificates curl \
+ && curl -fsSL https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux \
+      -o /usr/local/bin/yt-dlp \
+ && chmod a+rx /usr/local/bin/yt-dlp \
+ && yt-dlp --version \
+ && apt-get purge -y curl && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
+
+COPY apps/api/package.json ./
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/dist ./dist
+
+ENV PORT=3000 \
+    WORK_DIR=/app/work
+EXPOSE 3000
+CMD ["node", "dist/main.js"]