diff --git a/containers/zammad/docker-entrypoint.sh b/containers/zammad/docker-entrypoint.sh
index 1ec49c7..f99fd81 100644
--- a/containers/zammad/docker-entrypoint.sh
+++ b/containers/zammad/docker-entrypoint.sh
@@ -110,7 +110,7 @@ if [ "$1" = 'zammad-nginx' ]; then
   check_zammad_ready
 
   # configure nginx
-  if env | grep -q KUBERNETES; then
+  if ! env | grep -q KUBERNETES; then
     sed -e "s#server .*:3000#server ${ZAMMAD_RAILSSERVER_HOST}:${ZAMMAD_RAILSSERVER_PORT}#g" -e "s#server .*:6042#server ${ZAMMAD_WEBSOCKET_HOST}:${ZAMMAD_WEBSOCKET_PORT}#g" -e "s#server_name .*#server_name ${NGINX_SERVER_NAME};#g" -e 's#/var/log/nginx/zammad.\(access\|error\).log#/dev/stdout#g' < contrib/nginx/zammad.conf > /etc/nginx/sites-enabled/default
   fi
 
diff --git a/hooks/build b/hooks/build
index ecfd89c..e0549df 100755
--- a/hooks/build
+++ b/hooks/build
@@ -18,17 +18,17 @@ for DOCKER_IMAGE in ${DOCKER_IMAGES}; do
 
     echo "Build Zammad Docker image ${DOCKER_IMAGE} with version ${ZAMMAD_VERSION} for DockerHubs ${DOCKER_REGISTRY}/${GITHUB_USERNAME}/${DOCKER_REPOSITORY}:${DOCKER_IMAGE} repo"
 
-    docker build --pull --no-cache --build-arg BUILD_DATE=$(date -u +”%Y-%m-%dT%H:%M:%SZ”) -t ${DOCKER_REGISTRY}/${GITHUB_USERNAME}/${DOCKER_REPOSITORY}:${DOCKER_IMAGE} ${DOCKER_TAG} -f containers/${DOCKER_IMAGE}/Dockerfile .
+    docker build --pull --no-cache --build-arg BUILD_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" -t ${DOCKER_REGISTRY}/${GITHUB_USERNAME}/${DOCKER_REPOSITORY}:${DOCKER_IMAGE} ${DOCKER_TAG} -f containers/${DOCKER_IMAGE}/Dockerfile .
 
     docker push ${DOCKER_REGISTRY}/${GITHUB_USERNAME}/${DOCKER_REPOSITORY}:${DOCKER_IMAGE}
 
     if [ "${ZAMMAD_VERSION}" != "latest" ]; then
       docker push ${DOCKER_REGISTRY}/${GITHUB_USERNAME}/${DOCKER_REPOSITORY}:${DOCKER_IMAGE}-${ZAMMAD_VERSION}
-    fi  
+    fi
   else
     echo "Build Zammad Docker image ${DOCKER_IMAGE} for DockerHubs ${DOCKER_REPO}:${DOCKER_IMAGE} repo"
 
-    docker build --pull --no-cache --build-arg BUILD_DATE=$(date -u +”%Y-%m-%dT%H:%M:%SZ”) -t ${DOCKER_REPO}:${DOCKER_IMAGE} -f containers/${DOCKER_IMAGE}/Dockerfile .
+    docker build --pull --no-cache --build-arg BUILD_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" -t "${DOCKER_REPO}:${DOCKER_IMAGE}" -f containers/"${DOCKER_IMAGE}"/Dockerfile .
 
     docker push ${DOCKER_REPO}:${DOCKER_IMAGE}
   fi