Create go backend for site SSR and Dockerfile for dockerization

error_handling.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"html/template"
+	"net/http"
+	"path/filepath"
+	"slices"
+)
+
+var nonDebugErrors []int = []int{
+	http.StatusNotFound,
+	http.StatusBadRequest,
+	http.StatusTeapot,
+	http.StatusUnauthorized,
+}
+
+func notFoundHandler(w http.ResponseWriter, r *http.Request) {
+	sendError(w, http.StatusNotFound, "That page could not be found.")
+}
+
+func sendError(w http.ResponseWriter, code int, message string) {
+	tmpl := template.Must(template.ParseFiles(filepath.Join(contentDir, "templates/layout.gohtml"), filepath.Join(contentDir, "templates/error.gohtml")))
+	var data PageData
+	if *debug || slices.Contains(nonDebugErrors, code) {
+		data = PageData{
+			Header:        config.HeaderData,
+			StatusCode:    code,
+			StatusMessage: message,
+		}
+	} else {
+		data = PageData{
+			Header:        config.HeaderData,
+			StatusCode:    0,
+			StatusMessage: "An unknown error has occurred.",
+		}
+	}
+	w.WriteHeader(code)
+	tmpl.ExecuteTemplate(w, "layout", data)
+}