feat: add Dockerfile for containerization and update package dependencies for Svelte adapter

Dockerfile

@@ -0,0 +1,16 @@
+FROM node:22-alpine
+
+WORKDIR /app
+
+COPY package.json .
+COPY package-lock.json .
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+EXPOSE 3000
+
+CMD ["node", "build"]