add cors support to server.go

diff --git a/server/server.go b/server/server.go
index 62389b3..bbb98fa 100644
--- a/server/server.go
+++ b/server/server.go
@@ -130,6 +130,8 @@ func runCompile(body *string) ([]byte, error) {
 func compileHandler(w http.ResponseWriter, r *http.Request) {
        defer r.Body.Close()

+       w.Header().Set("Access-Control-Allow-Origin", "*")
+
        if r.Method != http.MethodPost {
                http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
                return