Documented website build workflow

Author: MagicLike

README.md

@@ -1 +1,19 @@
 # Website for the OpenAndroidInstaller project
+
+## Website build workflow
+
+This website is made with Bulma and gets build to a static page via the Python tools `make`, `poetry` and `jinja2`.
+
+To build the website follow the two following steps:
+
+- Install the dependencies:
+
+    ```
+    make install
+    ```
+
+- Build the website:
+
+    ```
+    make website
+    ```