diff --git a/.github/workflows/build-push-docker.yml b/.github/workflows/build-push-docker.yml
index 7559d57..133f72c 100644
--- a/.github/workflows/build-push-docker.yml
+++ b/.github/workflows/build-push-docker.yml
@@ -13,7 +13,6 @@ on:
 
 env:
   IMAGE_NAME: ${{ github.event.repository.name }}
-  # set this
   SITE_URL: 'https://docker.nemanjamitic.com'
 
 jobs:
@@ -58,6 +57,8 @@ jobs:
           context: ./
           # Dockerfile dir
           file: ./docker/Dockerfile
+          build-args: |
+            "ARG_SITE_URL=${{ env.SITE_URL }}"
           push: true
           tags: ${{ secrets.DOCKER_USERNAME }}/${{ env.IMAGE_NAME }}:latest
           # disabled metadata step
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6d5fe5b..af9fe8d 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -9,6 +9,12 @@ FROM base AS build
 COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
 COPY . .
+
+# build time only env var
+ARG ARG_SITE_URL
+ENV SITE_URL=$ARG_SITE_URL
+RUN echo "SITE_URL=$SITE_URL"
+
 RUN yarn build
 
 FROM nginx:stable-alpine3.17-slim AS runtime