Prepare repository for merge

git/snippets/add-submodule.md

@@ -0,0 +1,22 @@
+---
+title: Add a submodule
+type: snippet
+tags: [repository,submodule]
+author: chalarangelo
+cover: rocky-mountains
+dateModified: 2021-04-13T21:10:59+03:00
+---
+
+Adds a new submodule to the repository.
+
+- Use `git submodule add <upstream-path> <local-path>` to add a new submodule from `<upstream-path>` to `<local-path>`.
+
+```shell
+git submodule add <upstream-path> <local-path>
+```
+
+```shell
+git submodule add https://github.com/30-seconds/30-seconds-of-code ./30code
+# Creates the directory `30code` containing the submodule from
+# "https://github.com/30-seconds/30-seconds-of-code"
+```