[web] Added note on npm install.

Documentation/.vale/Vocab/ogs/accept.txt

@@ -22,6 +22,7 @@ Brato
 Bruns
 Carranza-Torres
 CLion
+CSS
 Dalen
 Damkilde
 Degener
@@ -54,8 +55,8 @@ Frieder
 frontmatter
 Futurile
 Galerkin
-Genuchten
 generalmod
+Genuchten
 Geoenergy
 Geotechnica
 Gerasimov
@@ -82,6 +83,7 @@ IPhreeqc
 ipynb
 ipyvtklink
 Jacobian
+JavaScript
 Johannsen
 Jong
 Jupyter
@@ -102,9 +104,9 @@ Makefile
 Massmann
 Matplotlib
 Mehran
+Merifield
 meshio
 METIS
-Merifield
 MFront
 Mikelic
 Minkley
@@ -120,6 +122,8 @@ NetBeans
 NetCDF
 Neumann
 nonassociated
+npm
+npx
 Nusselt
 ogs
 OGS

web/content/docs/devguide/documentation/web-docs/index.md

@@ -24,6 +24,7 @@ Benchmark documentation can also be given in form of Jupyter Notebooks, see [Jup
 
 - Download [Hugo](https://github.com/gohugoio/hugo/releases/latest) and put it in your `PATH`. **Attention:** Use the *extended* version: e.g. `hugo_extended_{{< dataFile "versions.minimum_version.hugo" >}}_Windows-64bit.zip`
 - Install [Yarn](https://yarnpkg.com/en/docs/install); for downloading required JavaScript & CSS development packages
+- Install [npm](https://www.npmjs.com) for CSS / JavaScript compilation with [npx](https://www.npmjs.com/package/npx)
 
 ## Getting started