Updated dockerfile to use npm 8.1 and output node version

docker/Dockerfile

@@ -42,7 +42,11 @@ WORKDIR /webpack
 
 COPY ./dashboard ./
 
-RUN npm i
+RUN node --version
+
+RUN npm install -g npm@8.1
+
+RUN npm i --legacy-peer-deps
 
 ENV NODE_ENV=production