feat: http handler to create images on disk

go.mod

@@ -0,0 +1,3 @@
+module screenmark/screenmark
+
+go 1.24.0

main.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+)
+
+func main() {
+	mux := http.NewServeMux()
+
+	mux.HandleFunc("OPTIONS /image/{name}", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Access-Control-Allow-Origin", "*")
+		w.Header().Add("Access-Control-Allow-Credentials", "*")
+		w.Header().Add("Access-Control-Allow-Headers", "*")
+	})
+
+	mux.HandleFunc("POST /image/{name}", func(w http.ResponseWriter, r *http.Request) {
+		imageName := r.PathValue("name")
+
+		w.Header().Add("Access-Control-Allow-Origin", "*")
+		w.Header().Add("Access-Control-Allow-Credentials", "*")
+		w.Header().Add("Access-Control-Allow-Headers", "*")
+
+		if len(imageName) == 0 {
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, "You need to provide a name in the path")
+			return
+		}
+
+		image, err := io.ReadAll(r.Body)
+
+		if err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, "Couldnt read the image from the request body")
+			return
+		}
+
+		file, err := os.Create("./db/" + imageName)
+		defer file.Close()
+
+		if err != nil {
+			log.Println(err)
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, "Couldnt create the file")
+			return
+		}
+
+		_, err = file.Write(image)
+		if err != nil {
+			log.Println(err)
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, "Couldnt write the image")
+			return
+		}
+	})
+
+	log.Println("Listening and serving.")
+
+	http.ListenAndServe(":3040", mux)
+}