Shorten Github issue template and add test example

Author: aldas

.github/ISSUE_TEMPLATE.md

@@ -1,23 +1,32 @@
 ### Issue Description
 
-### Checklist
+### Working code to debug
 
-- [ ] Dependencies installed
-- [ ] No typos
-- [ ] Searched existing issues and docs
+```go
+package main
 
-### Expected behaviour
+import (
+  "github.com/labstack/echo/v4"
+  "net/http"
+  "net/http/httptest"
+  "testing"
+)
 
-### Actual behaviour
+func TestExample(t *testing.T) {
+  e := echo.New()
 
-### Steps to reproduce
+  e.GET("/", func(c echo.Context) error {
+    return c.String(http.StatusOK, "Hello, World!")
+  })
 
-### Working code to debug
+  req := httptest.NewRequest(http.MethodGet, "/", nil)
+  rec := httptest.NewRecorder()
 
-```go
-package main
+  e.ServeHTTP(rec, req)
 
-func main() {
+  if rec.Code != http.StatusOK {
+    t.Errorf("got %d, want %d", rec.Code, http.StatusOK)
+  }
 }
 ```
 

README.md

@@ -75,6 +75,7 @@ package main
 import (
   "github.com/labstack/echo/v4"
   "github.com/labstack/echo/v4/middleware"
+  "log/slog"
   "net/http"
 )
 
@@ -90,7 +91,9 @@ func main() {
   e.GET("/", hello)
 
   // Start server
-  e.Logger.Fatal(e.Start(":1323"))
+  if err := e.Start(":8080"); err != nil && !errors.Is(err, http.ErrServerClosed) {
+    slog.Error("failed to start server", "error", err)
+  }
 }
 
 // Handler