Added Dockerfile

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:18-alpine
+
+# Path: /app
+
+WORKDIR /my-portofolio/
+
+COPY . .
+
+RUN npm install
+RUN npm run build
+RUN npm install -g serve
+
+CMD ["serve", "-s", "build"]