added paragraph about build files

README.md

@@ -27,4 +27,13 @@ This project requires the following:
 - TexLive
 - latexmk (often packaged with TexLive full-scheme)
 - python
-- pygments (python package for minted)
+- pygments (python package for minted)
+
+## Files created during build
+The build process of latexmk will create two folders for storing temporary cache files for faster rebuilds. The primary folder being `.tmp` which will hold every created .aux file. Additionally the resulting pdf file will be located besides main.tex as well as an index file called `main.synctex.gz` used for indexing between main.tex and main.pdf (unused by VSCode, used by Overleaf).
+
+Build files:
+- main.pdf
+- main.synctex.gz
+- .build/*
+- .tmp/*