auth: default admin/admin credentials on first install + bump 1.0.4

SeedAdmin now uses 'admin'/'admin' as defaults when environment
variables are not set, so the service works out-of-the-box after
first install.

Makefile

@@ -1,5 +1,5 @@
 BINARY=syncserver
-VERSION?=1.0.3
+VERSION?=1.0.4
 GO?=go
 LDFLAGS=-s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_FLAGS=CGO_ENABLED=0

cmd/server/main.go

@@ -20,7 +20,7 @@ import (
 	"github.com/syncserver/internal/syncengine"
 )
 
-var version = "1.0.3"
+var version = "1.0.4"
 
 func main() {
 	cfgPath := flag.String("config", "", "Path to config.yaml")

internal/auth/seed.go

@@ -6,8 +6,11 @@ import (
 )
 
 func SeedAdmin(db *sql.DB, username, password string) error {
-	if username == "" || password == "" {
+	if username == "" {
-		return nil
+		username = "admin"
+	}
+	if password == "" {
+		password = "admin"
 	}
 
 	var exists bool