Set up Siteforge container deployment and registry publishing

Dockerfile

@@ -0,0 +1,26 @@
+FROM node:22-alpine AS build
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+FROM node:22-alpine AS runtime
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV PORT=4173
+
+COPY package*.json ./
+RUN npm ci --omit=dev
+
+COPY --from=build /app/dist ./dist
+COPY server.js ./server.js
+COPY data ./data
+
+RUN mkdir -p /app/data
+
+EXPOSE 4173
+CMD ["node", "server.js"]