DEV: put nvm installation section into a separate include file

docs/source/contributing/developing-core.md

@@ -84,39 +84,9 @@ When developing a project using Plone, Yarn or other package managers may be use
 
 ### nvm
 
-The following terminal session commands use `bash` for the shell.
-Adapt them for your flavor of shell.
-
-```{seealso}
-See the [`nvm` install and update script documentation](https://github.com/nvm-sh/nvm#install--update-script).
-For the `fish` shell, see [`nvm.fish`](https://github.com/jorgebucaran/nvm.fish).
+```{include} ./install-nvm.md
 ```
 
-1.  Create your shell profile, if it does not exist.
-
-    ```shell
-    touch ~/.bash_profile
-    ```
-
-2.  Download and run the `nvm` install and update script, and pipe it into `bash`.
-
-    ```shell
-    curl -o- https://raw.githubusercontent.com/creationix/nvm/v{NVM_VERSION}/install.sh | bash
-    ```
-
-3.  Source your profile.
-    Alternatively close the session and open a new one.
-
-    ```shell
-    source ~/.bash_profile
-    ```
-
-4.  Verify that the `nvm` version is that which you just installed or updated:
-
-    ```shell
-    nvm --version
-    ```
-
 
 ### Node.js
 

docs/source/contributing/install-nvm.md

@@ -0,0 +1,32 @@
+The following terminal session commands use `bash` for the shell.
+Adapt them for your flavor of shell.
+
+```{seealso}
+See the [`nvm` install and update script documentation](https://github.com/nvm-sh/nvm#install--update-script).
+For the `fish` shell, see [`nvm.fish`](https://github.com/jorgebucaran/nvm.fish).
+```
+
+1.  Create your shell profile, if it does not exist.
+
+    ```shell
+    touch ~/.bash_profile
+    ```
+
+2.  Download and run the `nvm` install and update script, and pipe it into `bash`.
+
+    ```shell
+    curl -o- https://raw.githubusercontent.com/creationix/nvm/v{NVM_VERSION}/install.sh | bash
+    ```
+
+3.  Source your profile.
+    Alternatively close the session and open a new one.
+
+    ```shell
+    source ~/.bash_profile
+    ```
+
+4.  Verify that the `nvm` version is that which you just installed or updated:
+
+    ```shell
+    nvm --version
+    ```