truffle migrate --network rinkeby NOT WORKING

[treasersimplifies]

I followed the tutorial but found truffle will not automatically generate truffle.js and when I finished compiling and was about to migrate, I got this :

MacBook-Plou:truffle-compilation-and-deploy treaser$ truffle migrate --network rinkeby
Warning: Both truffle-config.js and truffle.js were found. Using truffle-config.js.

Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.

No response about migrate or deploy. It seemed truffle migrate just did what truffle compile's job...
PS: I didn't have Geth or ganache on my computer, because I just want to deploy my contract to public test network.