Update Docker setup with new Node, Yarn, etc

Dockerfile

@@ -1,9 +1,11 @@
-FROM ruby:2.5.1-alpine3.7
+FROM ruby:2.5.1
-RUN apk update && apk add --no-cache nodejs build-base
+RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
-RUN apk add yarn --no-cache --repository http://dl-3.alpinelinux.org/alpine/v3.8/community/ --allow-untrusted
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
+RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
+RUN apt-get update -qq && apt-get install -qq --no-install-recommends \
+    nodejs \
+    yarn \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/*
 RUN mkdir -p /app
 WORKDIR /app
-# COPY Gemfile Gemfile.lock ./
-# RUN bundle install -j 4
-# COPY package.json yarn.lock ./
-# RUN yarn

docker-compose.yml

@@ -5,6 +5,7 @@ services:
     volumes:
       - .:/app
       - rubygems:/usr/local/bundle
+      - node_modules:/app/node_modules
     ports:
       - '4001:4001'
       - '35729:35729'
@@ -12,3 +13,4 @@ services:
 
 volumes:
   rubygems:
+  node_modules: