added docker

Dockerfile

@@ -0,0 +1,27 @@
+
+FROM node:21-alpine as builder
+
+ARG API_BASE_URL="https://www.sangwaritaxi.com/"
+
+ENV REACT_APP_API_BASE_URL $API_BASE_URL
+
+WORKDIR /app
+
+COPY package.json package.json
+COPY yarn.lock yarn.lock
+
+RUN yarn install --frozen-lockfile
+
+COPY . .
+
+RUN yarn build
+
+
+FROM scratch
+
+WORKDIR /app
+
+COPY --from=builder /app/build ./build
+
+CMD ["sh"]
+# new