Swap curl with wget in install instructions

Swap out curl with wget in the install instructions as wget is
pre-installed on Ubuntu.

CHANGELOG.md

@@ -16,6 +16,8 @@ Version 1.2.2
   on node v10.
 - Reordered install instructions to avoid problem with npm creating files owned
   by root in the home directory.
+- Swapped curl out with wget in the install instructions as the latter comes
+  pre-installed on Ubuntu.
 
 
 Version 1.2.1

README.md

@@ -95,11 +95,11 @@ NodeJS does not support EOL ubuntu releases. Make sure you are on the most recen
 
 Master and all slaves:
 
-    sudo curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
+    wget -O - https://deb.nodesource.com/setup_9.x | sudo -E bash -
-    sudo apt install -y nodejs python-dev git wget curl tar build-essential
+    sudo apt install -y nodejs python-dev git build-essential
     git clone -b 1.2.x https://github.com/Danielv123/factorioClusterio.git
     cd factorioClusterio
-    curl -o factorio.tar.gz -L https://www.factorio.com/get-download/latest/headless/linux64
+    wget -O factorio.tar.gz https://www.factorio.com/get-download/latest/headless/linux64
     tar -xf factorio.tar.gz
     npm install --only=production
     cp config.json.dist config.json