readme: add quickstart guide

Give newcomers a self-contained sequence of commands to build,
configure, and start patchwork from scratch.

Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

README.md

@@ -19,8 +19,36 @@ of community projects.
 
 > [!NOTE]
 >
-> This project is the "next" version of patchwork rewritten in Go for:
->
-> - Speed (Python and especially Django are super slow)
-> - Ease of development (Virtual Envs get annoying fast)
-> - Ease of deployment (single native binary VS hundreds of text files)
+> This is the 4.0 rewrite of Patchwork in Go, replacing the Django/Python
+> codebase with a single statically compiled binary.
+
+## Quickstart
+
+Build and install:
+
+    make
+    sudo make install
+
+Generate a configuration file and edit it:
+
+    pw config > /etc/patchwork.toml
+    vim /etc/patchwork.toml
+
+Initialize the database, create an admin user and a project:
+
+    pw db sync
+    pw admin user create --admin -u admin -e admin@example.com
+    pw admin project create \
+        -n "My Project" -l my-project \
+        -i my-project.example.com -e patches@example.com
+
+Start the services:
+
+    pw http &
+    pw ingress &
+
+The web interface is now available at http://127.0.0.1:8080 and the SMTP
+ingress daemon listens on 127.0.0.1:2525.
+
+For production deployment with systemd, nginx and Postfix, see the
+[deployment guide](docs/deployment/installation.rst).