Temporarily lock to Node 14

Node 14 is triggering the styles redefintion bug. Historically this has
fixed itself within a few days and doesn't represent an error we made

Dockerfile

@@ -1,12 +1,12 @@
-FROM node:lts-alpine AS builder
+FROM node:14-alpine AS builder
 ENV NODE_ENV=production DISABLE_OPENCOLLECTIVE=true
 WORKDIR /oengus-webapp
 COPY ["package.json", "package-lock.json*", "npm-shrinkwrap.json*", "./"]
 RUN npm ci --also=dev --silent && mv node_modules ../
 COPY . .
 RUN npm run build
 
-FROM node:lts-alpine AS host
+FROM node:14-alpine AS host
 ENV NODE_ENV=production HOST=0.0.0.0 DISABLE_OPENCOLLECTIVE=true
 WORKDIR /oengus-webapp
 COPY ["package.json", "package-lock.json*", "npm-shrinkwrap.json*", "./"]