build: add gitea runner

.ansible/files/sour.is-paste.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=sour.is paste
+After=syslog.target network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/sour.is-paste
+User=www-data
+
+Restart=always
+RestartSec=30
+
+[Install]
+WantedBy=multi-user.target