add example systemd service

data/services/jf-accounts.service

@@ -1,8 +0,0 @@
-[Unit]
-Description=A basic account management system for Jellyfin.
-
-[Service]
-ExecStart={executable}
-
-[Install]
-WantedBy=default.target

jfa-go.service

@@ -0,0 +1,11 @@
+# Systemd service file for jfa-go. Install to ~/.config/systemd/user.
+
+[Unit]
+Description=A web app for managing users on Jellyfin
+
+[Service]
+# Modify this to the path to your executable, if necessary.
+ExecStart=/opt/jfa-go/jfa-go
+
+[Install]
+WantedBy=default.target