[DSC-2193] install yarn

Author: atarix83

Dockerfile.dist

@@ -15,6 +15,8 @@ FROM ${DOCKER_REGISTRY:-docker.io}/4science/dspace-cris-dependencies:${DSPACE_VE
 
 COPY --parents src/** config/** webpack/** docker/dspace-ui.json angular.json server.ts startup-message.ts tsconfig.json tsconfig.app.json tsconfig.server.json tsconfig.spec.json tsconfig.ts-node.json typedoc.json /app/
 
+RUN npm install --global yarn
+
 WORKDIR /app
 
 # Build Angular app