graph{
margin=0;
//rankdir="LR";
s [label="Web-App\nBiogames"];
c [label="Worker\nCelery"];
db [label="DB\nPostgres"];
t [label="HTTP frontend\nTraefik"];

s -- db [];
c -- db [label="Internal network"];
t -- s [label=" External network,\nlabel"];
s -- c [label="Shared volume"];
}