fix RUN

Dockerfile

@@ -1,13 +1,16 @@
 FROM registry.sindominio.net/debian as builder
 
+RUN apt-get update && \
+	apt-get install -y --no-install-recommends curl
+
 RUN echo "deb http://deb.debian.org/debian buster-backports main" >> /etc/apt/sources.list && \
+echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list
 
-RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list
 RUN curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg |  apt-key add -
 
 # Install Yarn
 RUN apt-get update && \
-	apt-get install -y --no-install-recommends curl yarn
+	apt-get install -y --no-install-recommends yarn
 
 # Install Node Latest
 RUN curl -sL https://deb.nodesource.com/setup_12.x | bash -