ctucx.git: serial2tcp

now uses envVars

diff --git a/src/serial2tcp.nim b/src/serial2tcp.nim
@@ -44,8 +44,10 @@ proc readSerial(serial: string) {.async.} =
     let line = await file.asyncReadLine()
     broadcast(line & '\n')
 
-let port = parseInt(paramStr(1))
-let serial = paramStr(2)
+let port   = parseInt(getEnv("PORT"))
+let serial = getEnv("SERIAL_DEVICE")
+
+
 asyncCheck serveTcp(port)
 asyncCheck readSerial(serial)
 runForever()