Add Docker Support

DockerFile

@@ -0,0 +1,33 @@
+# --- Build stage (if you transpile; otherwise this is basically a no-op)
+FROM node:20-alpine AS build
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci --omit=dev
+COPY . .
+# If you transpile (TS/webpack/etc.), do it here:
+# RUN npm run build
+
+# --- Runtime stage
+FROM node:20-alpine
+ENV NODE_ENV=production
+# Avoid running as root
+RUN addgroup -S nodegrp && adduser -S nodeusr -G nodegrp
+WORKDIR /app
+
+# Copy only what's needed at runtime
+COPY --from=build /app/package*.json ./
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/. ./
+
+# If your compiled output lives in /app/dist:
+# WORKDIR /app/dist
+
+# Healthcheck (customize the path/port if needed)
+HEALTHCHECK --interval=30s --timeout=3s --retries=3 \
+  CMD wget -qO- http://127.0.0.1:80/health || exit 1
+
+USER nodeusr
+EXPOSE 80
+EXPOSE 443
+# Ensure your server listens on 0.0.0.0:80 inside the container
+CMD ["npm", "start"]