Added "scale" option.

Author: mdjward

README.md

@@ -46,6 +46,7 @@ req.Footer(footer)
 req.Assets(style, img)
 req.PaperSize(gotenberg.A4)
 req.Margins(gotenberg.NoMargins)
+req.Scale(0.75)
 
 // store method allows you to... store the resulting PDF in a particular destination.
 client.Store(req, "path/you/want/the/pdf/to/be/stored.pdf")

chrome.go

@@ -16,6 +16,7 @@ const (
 	landscapeChrome            string = "landscape"
 	pageRanges                 string = "pageRanges"
 	googleChromeRpccBufferSize string = "googleChromeRpccBufferSize"
+	scale                      string = "scale"
 )
 
 // nolint: gochecknoglobals
@@ -101,3 +102,8 @@ func (req *chromeRequest) PageRanges(ranges string) {
 func (req *chromeRequest) GoogleChromeRpccBufferSize(bufferSize int64) {
 	req.values[googleChromeRpccBufferSize] = strconv.FormatInt(bufferSize, 10)
 }
+
+// Scale sets scale form field
+func (req *chromeRequest) Scale(scaleFactor float64) {
+	req.values[scale] = fmt.Sprintf("%f", scaleFactor)
+}

html_test.go

@@ -77,6 +77,7 @@ func TestHTMLComplete(t *testing.T) {
 	req.Margins(NormalMargins)
 	req.Landscape(false)
 	req.GoogleChromeRpccBufferSize(1048576)
+	req.Scale(1.5)
 	dirPath, err := test.Rand()
 	require.Nil(t, err)
 	dest := fmt.Sprintf("%s/foo.pdf", dirPath)