added docker

Dockerfile

@@ -0,0 +1,18 @@
+# Lightweight production image for the Hitstar Node app
+FROM node:22-alpine
+
+WORKDIR /app
+
+# Install dependencies
+COPY package*.json ./
+RUN npm ci --omit=dev || npm install --omit=dev
+
+# Copy app source (media lives outside via volume)
+COPY . .
+
+ENV NODE_ENV=production \
+    PORT=5173
+
+EXPOSE 5173
+
+CMD ["node", "server.js"]