doc: move quickstart to docs

doc/010_introduction.rst

@@ -17,3 +17,47 @@ Introduction
 Restic is a fast and secure backup program. In the following sections, we will
 present typical workflows, starting with installing, preparing a new
 repository, and making the first backup.
+
+Quickstart Guide
+****************
+
+To get started with a local repository, first define some environment variables:
+
+.. code-block:: console
+
+    export RESTIC_REPOSITORY=/srv/restic-repo
+    export RESTIC_PASSWORD=some-strong-password
+
+Initialize the repository (first time only):
+
+.. code-block:: console
+
+    restic init
+
+Create your first backup:
+
+.. code-block:: console
+
+    restic backup ~/work
+
+You can list all the snapshots you created with:
+
+.. code-block:: console
+
+    restic snapshots
+
+You can restore a backup by noting the snapshot ID you want and running:
+
+.. code-block:: console
+
+    restic restore --target /tmp/restore-work your-snapshot-ID
+
+It is a good idea to periodically check your repository's metadata:
+
+.. code-block:: console
+
+    restic check
+    # or full data:
+    restic check --read-data
+
+For more details continue reading the next sections.