update contributing page

Author: mateoconlechuga

docs/index.rst

@@ -40,4 +40,4 @@ Feel free to open bug reports or feature requests on the `GitHub Issues <https:/
     :caption: Contributing
     :maxdepth: 1
 
-    static/building
+    static/contributing

docs/static/building.rst

@@ -0,0 +1,81 @@
+.. _contributing:
+
+Contributing to the CE C Toolchain
+==================================
+
+If you are brave enough to contribute source to the CE C Toolchain, this page is for you!
+
+Creating PRs for review
+-----------------------
+
+Pull Requests (PRs) should branch from git :code:`master`.
+Before creating a PR, it is a good idea to get some feedback either from IRC or by creating a relevant issue.
+This will increase the chances of your PR being merged in a timely fashion.
+Please do not make large PRs; it is better to make smaller changes in different PRs.
+
+For information on how to fork a repo and create a PR using GitHub, see the `forking documentation <https://docs.github.com/en/free-pro-team@latest/github/getting-started-with-github/fork-a-repo>`_.
+
+Building the CE C Toolchain
+---------------------------
+
+Linux and macOS
+~~~~~~~~~~~~~~~
+
+Get the `ez80-clang LLVM compiler <https://github.com/jacobly0/llvm-project/wiki>`_.
+Make sure the compiler is located in the system's PATH environment variable.
+
+Get the `fasmg assembler <https://flatassembler.net/download.php>`_.
+The download is located near the bottom of the page.
+Extract the `fasmg` executable for your operating system to either the same place
+as `ez80-clang`, or in the system's PATH environment variable.
+
+Clone the repo:
+
+.. code-block:: bash
+
+    git clone --recurse-submodules https://github.com/CE-Programming/toolchain.git
+
+Build and install the toolchain:
+
+.. code-block:: bash
+
+    cd toolchain
+    make
+    make install
+
+By default, the toolchain is installed into the home (`~/CEdev`) directory.
+
+This is configurable with :code:`make install PREFIX=[LOCATION]`
+
+Windows
+~~~~~~~
+
+Get `MinGW <http://www.mingw.org>`_.
+The only required pacakges are `mingw32-base` and `mingw32-gcc-g++`.
+Make sure the `MinGW/bin` directory is in the system's PATH environment variable.
+
+Get the `ez80-clang LLVM compiler <https://github.com/jacobly0/llvm-project/wiki>`_.
+Make sure the compiler is located in the system's PATH environment variable.
+
+Get the `fasmg assembler <https://flatassembler.net/download.php>`_.
+The download is located near the bottom of the page.
+Extract the `fasmg` executable for your operating system to either the same place
+as `ez80-clang`, or in the system's PATH environment variable.
+
+Clone the repo:
+
+.. code-block:: bash
+
+    git clone --recurse-submodules https://github.com/CE-Programming/toolchain.git
+
+Build and install the toolchain:
+
+.. code-block:: bash
+
+    cd toolchain
+    mingw32-make
+    mingw32-make install
+
+By default, the toolchain is installed into the root (C:\\CEdev) directory.
+
+This is configurable with :code:`mingw32-make install PREFIX=[LOCATION]`