fix: updating minimum node version in readme

README.md

@@ -48,8 +48,8 @@ Our minimalist "Persona" theme gets you going right away, no coding experience r
 
 NodeBB requires the following software to be installed:
 
-* A version of Node.js at least 10 or greater ([installation/upgrade instructions](https://github.com/nodesource/distributions))
-* Redis, version 2.8.9 or greater **or** MongoDB, version 2.6 or greater
+* A version of Node.js at least 12 or greater ([installation/upgrade instructions](https://github.com/nodesource/distributions))
+* MongoDB, version 2.6 or greater **or** Redis, version 2.8.9 or greater
 * nginx, version 1.3.13 or greater (**only if** intending to use nginx to proxy requests to a NodeBB)
 
 ## Installation