Add HEALTHCHECK command for the container

this is the command for the alpine image according to
https://stackoverflow.com/a/62178148

Dockerfile

@@ -16,6 +16,7 @@ RUN git config --global url."https://github.com/".insteadOf [email protected]: \
 
 # production environment
 FROM nginx:1.25.3-alpine
+HEALTHCHECK CMD wget -O /dev/null http://localhost || exit 1
 COPY --from=build /app/build /usr/share/nginx/html
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]