📦 Fix bids-validator installation

Author: shnizzedy

Dockerfile

@@ -1,5 +1,15 @@
 FROM docker.io/fcpindi/c-pac:release-v1.3.0
-LABEL org.opencontainers.image.authors="The C-PAC Team <[email protected]>"
+LABEL org.opencontainers.image.authors="The C-PAC Team <[email protected]>" \
+      org.opencontainers.image.version="1.3.0.post2"
+ARG BIDS_VALIDATOR_VERSION="1.2.3"
+
+# Install the validator
+RUN apt-get update && \
+    apt-get install -y curl && \
+    curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
+    apt-get install -y nodejs && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
+    npm install -g "bids-validator@${BIDS_VALIDATOR_VERSION}"
 
 # install cpac
 COPY . /code