I am attempting to compile and run polkadot-JS/apps on Ubuntu cloud server (Digital Ocean). I have Node.JS and yarn installed. While running "yarn" in the polkadot-JS/apps folder, I get a number of dependency errors. I was careful not to use npm. Most of the errors reference webpack and react. I tried "yarn add webpack" and "yarn add react" but I get the same out put every time. Screenshot attached. Any ideas how to fix this? Would it be possible instead to compile it outside of the ubuntu VPS environment (like on an ubuntu laptop) and then just upload the compiled code?