The problem is in the context-root of the dockerfile

Author: vmcj

.github/workflows/build-gitlab-container-PR.yml

@@ -51,14 +51,15 @@ jobs:
       - name: Building an example chroot...
         run: |
           sudo apt install make pkg-config sudo debootstrap libcgroup-dev php-cli php-curl php-json php-xml php-zip lsof procps gcc g++ libcgroup-dev make acl zip unzip pv mariadb-server nginx php php-fpm php-gd php-cli php-intl php-mbstring php-mysql php-curl php-json php-xml php-zip composer ntp python3-yaml php-bcmath
-          wget https://github.com/DOMjudge/domjudge/archive/refs/heads/main.zip
-          unzip main.zip
-          cd domjudge-main
-            make configure
-            ./configure --with-domjudge-user=domjudge --with-judgehost_chrootdir="$(pwd)/chroot"
-          cd misc-tools
-            make dj_make_chroot
-            sudo ./dj_make_chroot
+          cd docker-gitlabci
+            wget https://github.com/DOMjudge/domjudge/archive/refs/heads/main.zip
+            unzip main.zip
+            cd domjudge-main
+              make configure
+              ./configure --with-domjudge-user=domjudge --with-judgehost_chrootdir="$(pwd)/chroot"
+            cd misc-tools
+              make dj_make_chroot
+              sudo ./dj_make_chroot
 
       - run: |
           sudo find . -name chroot