transition to yarn

Dockers/strapi/Dockerfile

@@ -12,7 +12,7 @@ WORKDIR /opt/app
 COPY ./strapi/package.json ./strapi/package-lock.json ./
 
 # Install all dependencies (including devDependencies)
-RUN npm ci
+RUN npm i -g yarn
 
 # Copy the rest of the Strapi app to a template directory
 COPY ./strapi /opt/app-template
@@ -39,4 +39,4 @@ ENV ALLOWED_HOSTS=localhost
 EXPOSE 1337
 
 ENTRYPOINT ["/entrypoint.sh"]
-CMD ["npm", "run", "develop"]
+CMD ["yarn", "develop"]