feat(ci): migrate to buildah

.gitlab/image-build.yaml

@@ -1,32 +1,26 @@
 ---
-
 variables:
-  DOCKER_DRIVER: "overlay2"
-  DOCKER_HOST: "tcp://localhost:2375/"
-  DOCKER_TLS_CERTDIR: ""
+  STORAGE_DRIVER: "overlay"
 
 stages:
   - "build"
 
 image-build:
   stage: "image-build"
-  image: "docker:28.2.2"
-  services:
-    - name: "docker:28.2.2-dind"
-      command: ["--tls=false"]
+  image: "quay.io/buildah/stable:latest"
   script:
 
-    # login to container registry
-    - "echo $CR_PASSWORD | docker login $CR_HOSTNAME -u $CR_USERNAME --password-stdin"
+    # Login to container registry
+    - echo $CR_PASSWORD | buildah login -u $CR_USERNAME --password-stdin $CR_HOSTNAME
 
-    # build docs-simoncor-net image
-    - "docker build -t docs-simoncor-net ."
+    # Build image using buildah (rootless)
+    - buildah bud -t docs-simoncor-net .
 
-    # add tags to image
-    - "docker image tag docs-simoncor-net cr.simoncor.net/siempie/docs-simoncor-net:latest"
+    # Tag the image for registry
+    - buildah tag docs-simoncor-net cr.simoncor.net/siempie/docs-simoncor-net:latest
 
-    # push image to dockerhub.
-    - "docker push --all-tags cr.simoncor.net/siempie/docs-simoncor-net"
+    # Push the image
+    - buildah push cr.simoncor.net/siempie/docs-simoncor-net:latest
 
-    # logout from container registry
-    - "docker logout $CR_HOSTNAME"
+    # Logout
+    - buildah logout $CR_HOSTNAME