Switch off debian:8 to debian:10 for the typescript build image

We only want to use an old version for glibc which the centos:7
image takes care of.

The old version of git used in debian:8 was causing problems
with the uid/gid passthrough with no user in passwd.

ci/dev/image/run.sh

@@ -11,11 +11,12 @@ main() {
     --rm \
     -v "$PWD:/src" \
     -e HOME="/src/.home" \
+    -e USER="coder" \
     -w /src \
     -p 127.0.0.1:8080:8080 \
     -u "$(id -u):$(id -g)" \
     -e CI \
-    "$(docker_build ./ci/images/debian8)" \
+    "$(docker_build ./ci/images/"${IMAGE-debian10}")" \
     "$@"
 }