Bump node version used to build frontend

.gitlab-ci.yml

@@ -10,7 +10,7 @@ default:
   - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
 
 build frontend:
-  image: node:lts-alpine
+  image: node:16-alpine
   stage: build frontend
   before_script: []
   variables:

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:12 AS frontend-builder
+FROM node:16 AS frontend-builder
 
 COPY ./maubot/management/frontend /frontend
 RUN cd /frontend && yarn --prod && yarn build