Initial scaffold: blob store server, CLI scripts, and PWA share target

Clipboard/screenshot sync across own devices via a single DEVICE_TOKEN-gated
blob store, plus a small installable web app so a phone can push/pull
clips and share screenshots via the OS share sheet.

Dockerfile

@@ -0,0 +1,41 @@
+# ── Stage 1: compile the TypeScript server ────────────────────────────────
+FROM node:24-slim AS server-build
+
+# better-sqlite3 has a native addon with no prebuilt binary for this
+# platform/Node combo yet — build it from source.
+RUN apt-get update -q && apt-get install -y --no-install-recommends python3 make g++ \
+  && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY server/package*.json server/
+COPY server/tsconfig.json server/
+RUN npm install --prefix server
+
+COPY server/src/ server/src/
+RUN npm run build --prefix server
+
+# ── Stage 2: runtime ───────────────────────────────────────────────────────
+FROM node:24-slim
+
+WORKDIR /app
+
+RUN apt-get update -q && apt-get install -y --no-install-recommends python3 make g++ \
+  && rm -rf /var/lib/apt/lists/*
+
+COPY server/package*.json server/
+RUN npm install --prefix server --omit=dev \
+  && apt-get purge -y python3 make g++ && apt-get autoremove -y
+
+COPY --from=server-build /app/server/dist server/dist
+COPY server/public/ server/public/
+
+# Do NOT copy data/ — mutable runtime volume holding the SQLite DB and blob
+# bytes. Baking it into the image would clobber it on every redeploy.
+ENV NODE_ENV=production
+ENV PORT=3000
+ENV DATA_DIR=/app/data
+
+EXPOSE 3000
+
+CMD ["node", "server/dist/index.js"]