Add Coolify deployment workflow

Dockerfile

@@ -0,0 +1,34 @@
+FROM node:22-bookworm-slim
+
+LABEL org.opencontainers.image.description="ToolCTRL Website"
+
+ARG APP_REVISION=local
+
+ENV NODE_ENV=production \
+    PORT=3000 \
+    HOST=0.0.0.0 \
+    DATA_DIR=/app/data \
+    APP_REVISION=${APP_REVISION}
+
+RUN apt-get update \
+  && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends ca-certificates curl \
+  && rm -rf /var/lib/apt/lists/* \
+  && groupadd --gid 1001 nodejs \
+  && useradd --uid 1001 --gid nodejs --home-dir /app --shell /usr/sbin/nologin nodejs
+
+WORKDIR /app
+
+COPY --chown=nodejs:nodejs public ./public
+COPY --chown=nodejs:nodejs server.js ./server.js
+
+RUN mkdir -p /app/data \
+  && chown -R nodejs:nodejs /app/data
+
+USER nodejs
+
+EXPOSE 3000
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+  CMD curl -fsS http://127.0.0.1:3000/healthz >/dev/null || exit 1
+
+CMD ["node", "server.js"]