Update Dockerfiel

frontend/Dockerfile

@@ -1,20 +1,18 @@
 FROM git.webdeploy.it/webdeploy/yarn AS build
 
 WORKDIR /usr
-COPY .yarnrc.yml ./
 COPY package.json ./
-COPY yarn.lock ./
+COPY package-lock.json ./
-RUN yarn install --immutable
+RUN npm ci
 COPY . ./
 RUN yarn build
 
 FROM git.webdeploy.it/webdeploy/yarn
 
 WORKDIR /app
-COPY .yarnrc.yml ./
 COPY package.json ./
-COPY yarn.lock ./
+COPY package-lock.json ./
-RUN yarn install --immutable
+RUN npm ci
 COPY --from=build /usr/build /app
 
 EXPOSE 8000