added frontend docker

Dockerfile

@@ -0,0 +1,17 @@
+FROM node:alpine
+EXPOSE 3000
+ 
+WORKDIR /app
+
+COPY package.json . 
+COPY package-lock.json .
+COPY tsconfig.json .
+
+RUN npm install
+
+COPY startup.sh .
+
+COPY public public
+COPY src src
+
+ENTRYPOINT [ "/usr/bin/env", "./startup.sh" ]