Added 503 error page and streamlined error paging

handlers/errorpage.go

@@ -0,0 +1,24 @@
+package handlers
+
+import (
+	"net/http"
+	"projectreshoot/view/page"
+)
+
+func ErrorPage(
+	errorCode int,
+	w http.ResponseWriter,
+	r *http.Request,
+) {
+	message := map[int]string{
+		401: "You need to login to view this page.",
+		403: "You do not have permission to view this page.",
+		404: "The page or resource you have requested does not exist.",
+		500: `An error occured on the server. Please try again, and if this
+        continues to happen contact an administrator.`,
+		503: "The server is currently down for maintenance and should be back soon. =)",
+	}
+	w.WriteHeader(http.StatusUnauthorized)
+	page.Error(errorCode, http.StatusText(errorCode), message[errorCode]).
+		Render(r.Context(), w)
+}