Update to the latest node image and install latest yarn/npm

Author: olafurpg

Dockerfile

@@ -5,6 +5,8 @@ ARG TAG
 
 RUN apk add --no-cache git curl
 
+RUN yarn global add npm yarn
+
 RUN yarn global add @sourcegraph/scip-typescript@${TAG} @sourcegraph/src
 
 CMD ["/bin/sh"]

Dockerfile.autoindex

@@ -11,6 +11,8 @@ RUN apk add --no-cache git bash curl ca-certificates python3 make libstdc++ libg
 # conversion.
 RUN echo 'scip-typescript "$@" --no-progress-bar' > /usr/bin/scip-typescript-autoindex && chmod +x /usr/bin/scip-typescript-autoindex
 
+RUN yarn global add npm yarn
+
 RUN yarn global add @sourcegraph/scip-typescript@${TAG} @sourcegraph/src
 
 CMD ["/bin/sh"]