Needs some additional install instructions

[user1007017]

Tried to install it and had some issues bringing it to life again:

2023/02/15
Elixir 1.15.0-dev (0cce63e) (compiled with Erlang/OTP 24)

did the following (not really know what am doing regarding the npm part)

cd assets
npm install --save-dev webpack
cd ..
mix deps clean
mix deps.update --all

after this command it started with webpack

export NODE_OPTIONS=--openssl-legacy-provider