update environment configuration for local development, enhance database initialization, and improve Nginx routing for admin access

backend/chat/go.mod

@@ -1,10 +1,11 @@
 module chat
 
-go 1.23
+go 1.23.0
 
 require (
 	github.com/gorilla/websocket v1.5.3
 	github.com/redis/go-redis/v9 v9.7.0
+	gorm.io/driver/postgres v1.5.11
 	gorm.io/driver/sqlite v1.5.7
 	gorm.io/gorm v1.25.12
 )
@@ -12,7 +13,14 @@ require (
 require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.7.5 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/mattn/go-sqlite3 v1.14.22 // indirect
-)
+	golang.org/x/crypto v0.37.0 // indirect
+	golang.org/x/sync v0.13.0 // indirect
+	golang.org/x/text v0.24.0 // indirect
+)