feat: updated docs and added description to files

Backend/endpoints/user-login.go

@@ -0,0 +1,17 @@
+package endpoints
+
+// this endpoint server at "/user/login" will show the login page or
+// directly login the user based on the http method used
+
+import "net/http"
+
+func LoginHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		showLoginPage(w, r, true, "")
+	case http.MethodPost:
+		loginUser(w, r)
+	default:
+		http.Error(w, "Method not allowed!", http.StatusMethodNotAllowed)
+	}
+}