Add Ubuntu deployment: scripts, SSL, systemd and setup.sh

internal/middleware/proxy.go

@@ -0,0 +1,19 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+)
+
+// TrustProxy восстанавливает схему HTTPS за Caddy/nginx.
+func TrustProxy(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if proto := r.Header.Get("X-Forwarded-Proto"); strings.EqualFold(proto, "https") {
+			r.URL.Scheme = "https"
+		}
+		if host := r.Header.Get("X-Forwarded-Host"); host != "" {
+			r.Host = host
+		}
+		next.ServeHTTP(w, r)
+	})
+}