Port needs to be an integer

I saw this connecting to MySQL:

```
** (stop) an exception was raised:
    ** (FunctionClauseError) no function clause matching in :inet_tcp.getserv/1
        (kernel 8.0.2) inet_tcp.erl:55: :inet_tcp.getserv("3306")
```

Fixed my updating port in the config:

`port: "3306",`

to 

`port: 3306,`

I guess the config generator needs to be updated.



