update building instructions

Author: HJfod

.gitignore

@@ -1 +1,2 @@
-.vscode/
+.vscode/
+dist/

README.md

@@ -10,6 +10,25 @@ Class & function documentation is built automatically from [the Geode source cod
 
 The docs are built using [Flash](https://github.com/hjfod/flash). To build the docs, you need Flash, along with [CMake](https://cmake.org/install/) and [Clang](https://clang.llvm.org/).
 
+To build the docs, you first need to clone Geode, and then clone the docs inside the Geode root, for a folder structure like this:
+
+```
+geode/
+    docs/
+        <docs files>
+    <geode files>
+```
+
+For example, you can do this with the following commands:
+
+```
+git clone https://github.com/geode-sdk/geode
+cd geode
+git clone https://github.com/geode-sdk/docs
+```
+
+Alternatively, you can symlink your local copy of the docs folder to your local copy of the Geode folder.
+
 After building Flash from source using Cargo or installing the latest release, you can build the docs with the following command:
 
 ```