go 1.16 features

- use go embed instead of go-binary and remove all about old assets (go 1.16 feature)
- pin gox version (go 1.16 feature)
- update ci to go 1.16

pkg/api/helpers.go

@@ -10,7 +10,6 @@ import (
 
 	"github.com/gin-gonic/gin"
 
-	"github.com/sosedoff/pgweb/pkg/data"
 	"github.com/sosedoff/pgweb/pkg/shared"
 )
 
@@ -145,16 +144,6 @@ func assetContentType(name string) string {
 	return result
 }
 
-func serveStaticAsset(path string, c *gin.Context) {
-	data, err := data.Asset("static" + path)
-	if err != nil {
-		c.String(400, err.Error())
-		return
-	}
-
-	c.Data(200, assetContentType(path), data)
-}
-
 // Send a query result to client
 func serveResult(c *gin.Context, result interface{}, err interface{}) {
 	if err == nil {