feat: update example compose, change default redirect

docker-compose.example.yml

@@ -6,6 +6,8 @@ services:
     build:
       context: .
       network: 'host'
+    environment:
+      - APP_URL=https://domain.com
     ports:
       - '80:8080'
     restart: 'always'

src/routes/options.go

@@ -28,11 +28,11 @@ func ChangeOptions(c *gin.Context) {
 		// get redirect url from query
 		redirectUrl := c.Query("redirect_url")
 		if redirectUrl == "" {
-			redirectUrl = "/"
+			redirectUrl = os.Getenv("APP_URL")
 		}
 
 		if !strings.HasPrefix(redirectUrl, os.Getenv("APP_URL")) {
-			redirectUrl = "/"
+			redirectUrl = os.Getenv("APP_URL")
 		}
 
 		c.Redirect(302, redirectUrl)