Do not alter source service during build

Closes #31

service.dist

@@ -0,0 +1,18 @@
+[Unit]
+Description=Bitwarden API server
+After=network.target
+
+[Service]
+Type=simple
+User=bitwarden
+ExecStart=/usr/local/bin/bitwarden_rs
+PrivateTmp=true
+PrivateDevices=true
+ProtectHome=true
+ProtectSystem=strict
+WorkingDirectory=/etc/bitwarden_rs
+ReadWriteDirectories=/var/lib/bitwarden_rs
+EnvironmentFile=/etc/bitwarden_rs/config.env
+
+[Install]
+WantedBy=multi-user.target