diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index acd3e1a..072162e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,6 +3,8 @@ docker-build:
   stage: build
   variables:
     DOCKER_IMAGE_NAME: olytest/hermione-fe:$CI_COMMIT_SHORT_SHA
+    LOCAL_DNS: '34.159.118.61 olympus-gateway.gcp.it'
+    VITE_BACKEND_URL: http://olympus-gateway.gcp.it/hermione
   before_script:
     - >
       echo  '{
@@ -17,7 +19,8 @@ docker-build:
       --context "${CI_PROJECT_DIR}"
       --dockerfile "${CI_PROJECT_DIR}/Dockerfile"
       --destination "${DOCKER_IMAGE_NAME}"
-      --build-arg "VITE_BACKEND_URL=https://olympus-api-gateway-nu6mvqujsq-ey.a.run.app/hermione"
+      --build-arg "VITE_BACKEND_URL=${VITE_BACKEND_URL}"
+      --build-arg "LOCAL_DNS=${LOCAL_DNS}"
   # Run this job in a branch where a Dockerfile exists
   rules:
     - if: $CI_COMMIT_BRANCH
diff --git a/Dockerfile b/Dockerfile
index 7412688..963c4a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,12 @@ WORKDIR /usr/src/app
 # this will allow us to run vite and other tools directly
 ENV PATH /usr/src/node_modules/.bin:$PATH
 
+# Add custom DNS mapping
+ARG LOCAL_DNS
+RUN echo "$LOCAL_DNS" >> /etc/hosts
+
+RUN cat /etc/hosts
+
 # inject all environment vars we'll need
 ARG VITE_BACKEND_URL
 ENV VITE_BACKEND_URL=$VITE_BACKEND_URL