Adding gif support for boards (#2126)

* Adding gif support for boards

* Updating api

server/api/api.go

@@ -1320,6 +1320,7 @@ func (a *API) handleServeFile(w http.ResponseWriter, r *http.Request) {
 	// - application/json
 	// - image/jpg
 	// - image/png
+	// - image/gif
 	// parameters:
 	// - name: workspaceID
 	//   in: path
@@ -1370,6 +1371,10 @@ func (a *API) handleServeFile(w http.ResponseWriter, r *http.Request) {
 		contentType = "image/png"
 	}
 
+	if fileExtension == "gif" {
+		contentType = "image/gif"
+	}
+
 	w.Header().Set("Content-Type", contentType)
 
 	fileReader, err := a.app.GetFileReader(workspaceID, rootID, filename)

webapp/src/components/content/imageElement.tsx

@@ -56,7 +56,7 @@ contentRegistry.registerContentType({
                     block.fields.fileId = fileId || ''
                     resolve(block)
                 },
-                '.jpg,.jpeg,.png')
+                '.jpg,.jpeg,.png,.gif')
             },
         )