fix(ui):switched to GraphiQL UI (#36)

* switch to GraphiQL UI

---------

Co-authored-by: Artem Shcherbatiuk <[email protected]>

Author: vertex451

Diff for: internal/config/config.go

@@ -8,12 +8,13 @@ type Config struct {
 	Port       string `envconfig:"default=8080,optional"`
 	LogLevel   string `envconfig:"default=INFO,optional"`
 	WatchedDir string `envconfig:"default=definitions,required"`
-	Handler    HandlerConfig
+	HandlerCfg HandlerConfig
 }
 
 type HandlerConfig struct {
 	Pretty     bool `envconfig:"default=true,optional"`
 	Playground bool `envconfig:"default=true,optional"`
+	GraphiQL   bool `envconfig:"default=true,optional"`
 }
 
 // NewFromEnv creates a Config from environment values

Diff for: internal/manager/manager.go

@@ -163,8 +163,9 @@ func (s *Service) loadSchemaFromFile(filename string) (*graphql.Schema, error) {
 func (s *Service) createHandler(schema *graphql.Schema) *graphqlHandler {
 	h := handler.New(&handler.Config{
 		Schema:     schema,
-		Pretty:     s.appCfg.Handler.Pretty,
-		Playground: s.appCfg.Handler.Playground,
+		Pretty:     s.appCfg.HandlerCfg.Pretty,
+		Playground: s.appCfg.HandlerCfg.Playground,
+		GraphiQL:   s.appCfg.HandlerCfg.GraphiQL,
 	})
 	return &graphqlHandler{
 		schema:  schema,