improve unit file

.gitignore

@@ -1,3 +1,4 @@
+moshing-mammut.pid
 yt_auth_token
 spotify_auth_token
 *.db

moshing-mammut.service.EXAMPLE

@@ -1,14 +1,17 @@
 [Unit]
 Description=Moshing Mammut
+After=network.target
 
 [Service]
 ExecStart=/home/moshing-mammut/app/start.sh
-Restart=always
+Restart=on-failure
 User=moshing-mammut
 Group=moshing-mammut
 Environment=PATH=/usr/bin:/usr/local/bin
 Environment=NODE_ENV=production
 WorkingDirectory=/home/moshing-mammut/app
+Type=forking
+PIDFile=/home/moshing-mammut/app/moshing-mammut.pid
 
 [Install]
 WantedBy=multi-user.target

start.sh.EXAMPLE

@@ -1,3 +1,3 @@
 #!/bin/bash
 . /home/moshing-mammut/.nvm/nvm.sh
-node -r dotenv/config build
+node -r dotenv/config build &