envContent function
Returns the .env file content as a string for the given host, port, OYDA base, user, and password.
The .env file content includes environment variable assignments for host, port, OYDA base, user, and password.
Implementation
String envContent(String host, int port, String oydaBase, String user,
String password, int devKey) =>
'''
HOST=$host
PORT=$port
OYDABASE=$oydaBase
USER=$user
PASSWORD=$password
DEV_KEY=$devKey
''';