feat: add basic working server

go.mod

@@ -0,0 +1,3 @@
+module github.com/jabuxas/abyss
+
+go 1.22.6

main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"time"
+)
+
+const (
+	url      = "localhost"
+	port     = ":8080"
+	imageDir = "./images"
+)
+
+func main() {
+	http.HandleFunc("/upload", uploadHandler)
+	http.Handle("/", http.StripPrefix("/", http.FileServer(http.Dir(imageDir))))
+	log.Printf("Server running on port %s\n", port)
+	log.Fatal(http.ListenAndServe(port, nil))
+}
+
+func uploadHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		return
+	}
+
+	file, _, err := r.FormFile("image")
+	if err != nil {
+		http.Error(w, "Error retrieving the file", http.StatusBadRequest)
+		return
+	}
+	defer file.Close()
+
+	if _, err := os.Stat(imageDir); err != nil {
+		if err := os.Mkdir(imageDir, 0750); err != nil {
+			log.Fatalf("Couldn't create dir %s\n", imageDir)
+		}
+	}
+
+	time := time.Now().Unix() * 3
+	filename := fmt.Sprintf("%s/%d", imageDir, time)
+
+	dst, err := os.Create(filename)
+	if err != nil {
+		log.Fatalf("Couldn't create file %s\n", filename)
+	}
+	defer dst.Close()
+
+	if _, err := io.Copy(dst, file); err != nil {
+		http.Error(w, "Error copying the file", http.StatusInternalServerError)
+	}
+
+	fmt.Fprintf(w, "http://%s%s/%d\n", url, port, time)
+}