chore: update steps in readme

README.md

@@ -1,3 +1,14 @@
 # posts-go
 
-Write markdown, then convert to html.
+Write markdown, convert to html, then publish using Github Pages.
+
+Steps:
+
+```sh
+# Write new post in posts/
+
+# Update index in posts/index.md
+
+# Genrate HTML
+go run ./main.go
+```