Fix ijavascript example (#2143)

* Fix ijavascript example

* Better naming

Author: mathbunnyru

docs/using/recipe_code/ijavascript.dockerfile

@@ -0,0 +1,23 @@
+FROM quay.io/jupyter/base-notebook
+
+USER root
+
+RUN apt-get update --yes && \
+    apt-get install --yes --no-install-recommends \
+    make \
+    g++ && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+USER ${NB_UID}
+
+# NodeJS <= 20 is required
+# https://github.com/n-riesco/ijavascript/issues/184
+RUN mamba install --yes nodejs=20.* && \
+    mamba clean --all -f -y && \
+    fix-permissions "${CONDA_DIR}" && \
+    fix-permissions "/home/${NB_USER}"
+
+# hadolint ignore=DL3016
+RUN npm install -g ijavascript
+# hadolint ignore=DL3059
+RUN ijsinstall

docs/using/recipes.md

@@ -482,18 +482,10 @@ docker run -it --rm \
 
 ## Add ijavascript kernel to container
 
-```{warning}
-This recipe is not tested and might be broken.
-```
-
-The example below is a Dockerfile to install the [ijavascript kernel](https://github.com/n-riesco/ijavascript).
+The example below is a Dockerfile to install the [IJavascript kernel](https://github.com/n-riesco/ijavascript).
 
-```dockerfile
-FROM quay.io/jupyter/scipy-notebook
-
-# install ijavascript
-RUN npm install -g ijavascript
-RUN ijsinstall
+```{literalinclude} recipe_code/ijavascript.dockerfile
+:language: docker
 ```
 
 ## Add Microsoft SQL Server ODBC driver