Add plug-in-only filter to web app + deploy script

- Checkbox 'plug-in only (≤ 0.8 kW, no electrician)' filters the leaderboard
  client-side and re-picks the top recommendation from visible rows.
  Filter state is persisted in localStorage.
- scripts/deploy.sh: idempotent rsync + systemd setup against the
  'thuisbatterij' SSH alias. Run after provisioning the h4a workload.

Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.12-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PORT=8080
+
+WORKDIR /app
+
+COPY pyproject.toml uv.lock README.md ./
+COPY src ./src
+
+RUN pip install --no-cache-dir uv \
+ && uv pip install --system --no-cache .
+
+COPY data ./data
+
+EXPOSE 8080
+
+CMD ["sh", "-c", "gunicorn pluginbattery.web:app --bind 0.0.0.0:${PORT:-8080} --workers 1 --timeout 120"]