diff --git a/Dockerfile b/Dockerfile
index c9d8818..346cc80 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,10 @@ COPY package*.json ./
 RUN npm ci
 
 COPY . .
+ARG SITE_URL
+ARG COOLIFY_URL
+ENV SITE_URL=${SITE_URL}
+ENV COOLIFY_URL=${COOLIFY_URL}
 RUN npm run build
 
 FROM nginx:alpine
diff --git a/astro.config.mjs b/astro.config.mjs
index bcee5fa..c9c33d2 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -1,7 +1,9 @@
 import { defineConfig } from "astro/config";
 
+const siteUrl = (process.env.SITE_URL || process.env.COOLIFY_URL || "https://heidrich-bedachung.de").replace(/\/$/, "");
+
 export default defineConfig({
-  site: "https://heidrich-bedachung.de",
+  site: siteUrl,
   output: "static",
   trailingSlash: "always",
 });
diff --git a/src/data/site.ts b/src/data/site.ts
index 9a655cf..a68139e 100644
--- a/src/data/site.ts
+++ b/src/data/site.ts
@@ -1,8 +1,10 @@
+const siteUrl = (process.env.SITE_URL || process.env.COOLIFY_URL || "https://heidrich-bedachung.de").replace(/\/$/, "");
+
 export const site = {
   name: "Heinz Heidrich GmbH",
   description:
     "Dachdecker- und Bauklempnerbetrieb aus Tostedt für Hamburg, Bremen, Buchholz, die Nordheide und Umgebung.",
-  url: "https://heidrich-bedachung.de",
+  url: siteUrl,
   phone: "04182 5802",
   phoneHref: "tel:+4941825802",
   fax: "04182 21480",