fix: Fix copy path for front-end build

Dockerfile

@@ -24,7 +24,7 @@ COPY ./app/server/package.json .
 RUN npm install --production
 COPY ./app/server .
 # Copy client app into public folder
-COPY --from=clientbuild /usr/src/app/build ./public
+COPY --from=clientbuild /usr/src/app/build ./src/public
 
 ENV MONGODB_URL mongodb://todo-mongo-service:27017