Updated README.md with alpine dependecies (#184)

* Updated README.md with alpine dependecies

* Updated README.md with alpine dependecies

README.rst

@@ -37,6 +37,13 @@
 
     $ sudo yum install gcc libffi-devel python-devel
 
+For Alpine, the following command will ensure that the required dependencies are installed:
+
+.. code:: bash
+
+    $ apk add --update musl-dev gcc libffi-dev
+
+
 Alternatives
 ============