Disconnected from PostgreSQL (Error: connect ECONNREFUSED 127.0.0.1:5432)

I can connect to PostgreSQL with cli:
```
psql "host=localhost user=snowdream dbname=postgres sslmode=disable password=password"
```

but I can not connect to PostgreSQL with franchise:

The logs in the browser's console are as follows:

```
Error: connect ECONNREFUSED 127.0.0.1:5432
onmessage bridge.js:51
o bridge.js:46
NweS bridge.js:172
setInterval handler*NweS/< bridge.js:170
NweS app.ea24d546.js:60839
n (index):80
GZFs app.ea24d546.js:35669
n (index):80
JZd6 app.ea24d546.js:39056
n (index):80
eslX app.ea24d546.js:81980
n (index):80
lVK7 index.js:1
n (index):80
0 app.ea24d546.js:1453
n (index):80
webpackJsonp (index):80
app.ea24d546.js:1
generic.js:23:16

```