Fix initial lint violations.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

cmd/placeholder-name/main.go

@@ -6,9 +6,10 @@ SPDX-License-Identifier: Apache-2.0
 package main
 
 import (
-	"github.com/suzerain-io/placeholder-name/pkg/handlers"
 	"log"
 	"net/http"
+
+	"github.com/suzerain-io/placeholder-name/pkg/handlers"
 )
 
 func main() {

pkg/handlers/handlers.go

@@ -7,7 +7,7 @@ package handlers
 
 import "net/http"
 
-const JsonMimeType = "application/json; charset=utf-8"
+const JSONMimeType = "application/json; charset=utf-8"
 const HeaderNameContentType = "Content-Type"
 
 func New() http.Handler {

pkg/handlers/healthz_handler.go

@@ -19,7 +19,7 @@ type healthzHandler struct{}
 func (h healthzHandler) ServeHTTP(responseWriter http.ResponseWriter, _ *http.Request) {
 	response := healthzResponse{"OK"}
 	js, _ := json.Marshal(response)
-	responseWriter.Header().Set(HeaderNameContentType, JsonMimeType)
+	responseWriter.Header().Set(HeaderNameContentType, JSONMimeType)
 	_, _ = responseWriter.Write(js)
 }
 

pkg/handlers/healthz_handler_test.go

@@ -6,23 +6,37 @@ SPDX-License-Identifier: Apache-2.0
 package handlers_test
 
 import (
-	"github.com/stretchr/testify/require"
-	"github.com/suzerain-io/placeholder-name/pkg/handlers"
+	"context"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/suzerain-io/placeholder-name/pkg/handlers"
 )
 
 func TestHealthzReturnsOkWithJsonBody(t *testing.T) {
 	expect := require.New(t)
 	server := httptest.NewServer(handlers.New())
 	defer server.Close()
-	client := http.Client{}
 
-	response, err := client.Get(server.URL + "/healthz")
+	// Create a request context with a short timeout.
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel()
 
+	// Initialize an HTTP GET request to /healthz
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, server.URL+"/healthz", nil)
 	expect.NoError(err)
+
+	// Perform the request and assert that we received a response.
+	response, err := http.DefaultClient.Do(req)
+	expect.NoError(err)
+	defer response.Body.Close()
+
+	// Assert that we got an HTTP 200 with the correct content type and JSON body.
 	expect.Equal(http.StatusOK, response.StatusCode)
 	expect.Equal("application/json; charset=utf-8", response.Header.Get("content-type"))
 	body, err := ioutil.ReadAll(response.Body)