feat: switch from npm to yarn (#500)

* feat: switch from npm to yarn

* fix: build

* fix: replace yarn run with yarn

* fix: nodejs version install in Docker image

* fix: initialize mobx state

Co-authored-by: Karol Sójko <karolsojko@gmail.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.7.1-alpine
+FROM ruby:2.7.1-alpine3.12
 
 ARG UID=1000
 ARG GID=1000
@@ -7,10 +7,11 @@ RUN addgroup -S webapp -g $GID && adduser -D -S webapp -G webapp -u $UID
 
 RUN apk add --update --no-cache \
     alpine-sdk \
-    nodejs \
+    nodejs-current \
     python2 \
     git \
     nodejs-npm \
+    yarn \
     tzdata
 
 WORKDIR /app/
@@ -19,17 +20,17 @@ RUN chown -R $UID:$GID .
 
 USER webapp
 
-COPY --chown=$UID:$GID package.json package-lock.json Gemfile Gemfile.lock /app/
+COPY --chown=$UID:$GID package.json yarn.lock Gemfile Gemfile.lock /app/
 
 COPY --chown=$UID:$GID vendor /app/vendor
 
-RUN npm ci
+RUN yarn install --pure-lockfile
 
 RUN gem install bundler && bundle install
 
 COPY --chown=$UID:$GID . /app/
 
-RUN npm run bundle
+RUN yarn bundle
 
 RUN bundle exec rails assets:precompile