makes the n program available in the autoindex image (#313)

This is used by the default auto index script in the main repo

Author: kritzcreek

Dockerfile.autoindex

@@ -11,7 +11,7 @@ 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 npm yarn n
 
 RUN yarn global add @sourcegraph/scip-typescript@${TAG} @sourcegraph/src
 
@@ -21,4 +21,7 @@ COPY ./dev/lenient-yarn.sh /usr/local/bin/yarn
 RUN mv /usr/local/bin/npm /usr/local/bin/actual-npm
 COPY ./dev/lenient-npm.sh /usr/local/bin/npm
 
+RUN mv /usr/local/bin/n /usr/local/bin/actual-n
+COPY ./dev/lenient-n.sh /usr/local/bin/n
+
 CMD ["/bin/sh"]

dev/lenient-n.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -eux
+
+/usr/local/bin/actual-n "$@" || echo "scip-typescript: ignoring n auto failure, will try to auto-index the project with the pre-installed node version"