Avoid 60-second delay from deprecated Node install script

[p2edwards]

Description

Nodesource has deprecated their curl-bash script (https://deb.nodesource.com/setup_16.x), so now we see this when building kpi images:

TO AVOID THIS WAIT MIGRATE THE SCRIPT 
Continuing in 60 seconds (press Ctrl-C to abort)

To fix this, we can switch to Nodesource's new deb packages on nodistro.

• Some references:
  • Installation Instructions from Nodesource
  • A stackoverflow answer for "how to correctly install nodejs on a docker container"
  • This PR on internetarchive/openlibrary (puts it in a script)

🚧 completely untested code patch that tries to keep it in a single run command

diff --git a/Dockerfile b/Dockerfile
index 29b8cc9eb..645f87975 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,8 +56,13 @@ RUN mkdir -p "${NGINX_STATIC_DIR}" && \
 # jnm (or the current on-call sysadmin). Thanks.
 
 RUN apt-get -qq update && \
-    apt-get -qq -y install curl && \
-    curl -sL https://deb.nodesource.com/setup_16.x | bash - && \
+    apt-get -qq -y install ca-certificates curl gnupg && \
+    mkdir -p /etc/apt/keyrings && \
+    curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key \
+        | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
+    echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_16.x nodistro main" \
+        | tee /etc/apt/sources.list.d/nodesource.list && \
+    apt-get -qq update && \
     apt-get -qq -y install --no-install-recommends \
         ffmpeg \
         gdal-bin \

Related issues

Somewhat related to #4498

[LMNTL]

Fixed by kpi#4644.