Python 3.5.1 > Synology

Hello saviours,

Today I received my DS218+ NAS, it looks really nice and works fast, however I have 0 experience with linux.
I was planning to run Python scripts 24/7 on my NAS, but so far I was only able to start up a script using Putty.
The problem using putty is, whenever you close it it shuts down the scipts aswell. Does anyone know how I can run my script 24/7 on my DS218+?

My script is located at:
/homes/SteveW/Scripts/TRN/instabot-master/examples/autopost/auto_post.py

I don’t mind starting it up manually as long as it runs 24/7.

Thanks in advance!

SteveW