error pages

.gitignore

@@ -42,4 +42,35 @@
 .~lock*
 .build_version
 /core*
-.ruby-lsp/*
+.ruby-lsp/*
+
+public/400.html
+public/401.html
+public/402.html
+public/403.html
+public/404.html
+public/405.html
+public/406.html
+public/407.html
+public/408.html
+public/409.html
+public/410.html
+public/411.html
+public/412.html
+public/413.html
+public/414.html
+public/415.html
+public/416.html
+public/417.html
+public/422.html
+public/423.html
+public/424.html
+public/426.html
+public/500.html
+public/501.html
+public/502.html
+public/503.html
+public/504.html
+public/505.html
+public/507.html
+public/510.html