Add container deployment: Dockerfile, compose, systemd unit, redeploy script

Multi-stage build (node -> go -> alpine) producing the static tefterd
binary with the frontend embedded. Compose follows the house style for
the podman/SELinux server (:Z volume label + label:disable). deploy/
holds the user systemd unit and redeploy-tefter.sh, mirroring the
apelacija setup.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

deploy/tefter.service

@@ -0,0 +1,20 @@
+# User unit — install to ~/.config/systemd/user/tefter.service, then:
+#   systemctl --user daemon-reload && systemctl --user enable --now tefter.service
+# Requires lingering (loginctl enable-linger) so it survives logout.
+
+[Unit]
+Description=Tefter notes server (podman-compose)
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+Type=simple
+WorkingDirectory=%h/tefter
+EnvironmentFile=%h/tefter/.env.docker
+ExecStart=/home/hamo/.local/bin/podman-compose up
+ExecStop=/home/hamo/.local/bin/podman-compose down
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=default.target