Update README.md

README.md

@@ -22,6 +22,22 @@ along with this program.  If not, see https://www.gnu.org/licenses/.
 
 ## Requirement & Installation
 
+### Clone the repository
+
+Clone the repository with `--recursive` when cloning the repo.
+
+    git clone https://gitea.ditaajipratama.net/aji/costapy.git --recursive
+
+Note that if you forgot the `--recursive` flag you can do:
+
+    git submodule update --init
+
+Note that when submodules have other submodules you need recursive option.
+
+    git submodule update --init --recursive
+
+### Dependencies
+
 You need this libraries to use CostaPy:
 - bottle
 - gunicorn