I'm not the same author, but I run several Webapps in systemd units, with the below service for all of them:

Note the @ in the name, that means I reuse it as webapp@api.domain.name webapp@frontend.domain.name and so on.

----8<---- webapp@.service ---->8---- [Unit] Description=%i webapp

    [Service]
    User=%i
    Group=%i

    # Note that the first argument of the command line (i.e. the program to execute) 
    # may not include % specifiers.
    ExecStart=/srv/webapp %i
    WorkingDirectory=/srv/%i/

    PrivateTmp=true
    Type=simple
    Restart=always
    RestartSec=2s

    [Install]
    WantedBy=multi-user.target

---- 8< ----

/srv/webapp is a simple script that will do "exec $1/webapp" which is the actual executable.