I am developing an online platform for renting computer hardware and I've reached the point where I need to create the website. I do not have the required expertise to do that, so I thought I would hire someone to do it. I am currently an individual working at this in my spare time, but I would like to create a business wrapped around this platform at some point.
So far I've been working alone because I was afraid of so called "employees" stealing parts of the project and claiming it as their own. I cannot proceed like this any longer, since the project has grown to a size which I can't handle alone anymore.
I would like to hire someone to help me develop it. What steps should I follow to keep my project safe? Can I somehow make sure that what the said partner is working on will only be used in this specific project, and if given access to existing parts of the project, he/she would not reuse them in their own projects?
Note: It is my first time here and I have no knowledge regarding copyrights at all, please excuse any obvious questions.