Bug: Environment variable PORT is named EXPOSED_PORT in sample env file

[mscMMN]

This environment variable PORT is not set in the supplied sample env file:

syncing-server/config/puma.rb

Line 12 in b46dad7

port ENV.fetch("PORT") { 3000 }

Instead it's named EXPOSED_PORT.

syncing-server/.env.sample

Line 10 in d76615c

EXPOSED_PORT=3000

Please review my proposed changes: #169

[karolsojko]

We have a new documentation suite out. Please give a try and re-check if it helps with your issue: https://docs.standardnotes.org/self-hosting/getting-started/