restore normal gitlab ci

.gitlab-ci.yml

@@ -3,12 +3,9 @@ stages:
   - deploy
 
 variables:
-  # Nix configuration
-  NIX_CONFIG: |
-    experimental-features = nix-command flakes
-    substituters = https://cache.nixos.org https://towerops.cachix.org
-    trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= towerops.cachix.org-1:YOUR_PUBLIC_KEY_HERE
-  CACHIX_CACHE: "towerops"
+  DOCKER_BUILDKIT: 1
+  CI_BUILDX_ARCHS: "linux/amd64"
+  DOCKER_TLS_CERTDIR: ""
 
 workflow:
   auto_cancel:
@@ -18,42 +15,23 @@ build:
   stage: build
   interruptible: true
   tags:
-    - nix  # Requires GitLab Runner with Nix installed
-  image: nixos/nix:latest
+    - home
+  image: docker:27
+  services:
+    - docker:27-dind
   before_script:
-    # Install Docker for loading and pushing images
-    - nix-env -iA nixpkgs.docker
-    # Install Cachix if auth token is available
-    - |
-      if [ -n "$CACHIX_AUTH_TOKEN" ]; then
-        nix-env -iA cachix -f https://cachix.org/api/v1/install
-        echo "$CACHIX_AUTH_TOKEN" | cachix authtoken
-      fi
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
   script:
-    # Build Docker image with Nix
-    - echo "Building Docker image with Nix..."
-    - nix build .#dockerImage --print-build-logs
-
-    # Push build artifacts to Cachix for faster future builds
-    - |
-      if [ -n "$CACHIX_AUTH_TOKEN" ]; then
-        echo "Pushing build artifacts to Cachix..."
-        nix path-info --json .#dockerImage | jq -r '.[].path' | cachix push $CACHIX_CACHE
-      fi
-
-    # Load image into Docker
-    - echo "Loading Docker image..."
-    - docker load < result
-
-    # Tag image with commit SHA and latest
-    - docker tag $(docker images -q | head -1) $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
-    - docker tag $(docker images -q | head -1) $CI_REGISTRY_IMAGE:latest
-
-    # Login to GitLab Container Registry
-    - echo "$CI_REGISTRY_PASSWORD" | docker login -u $CI_REGISTRY_USER --password-stdin $CI_REGISTRY
-
-    # Push to registry
-    - echo "Pushing to GitLab Container Registry..."
+    # Pull latest image for layer caching (ignore failures if not exists)
+    - docker pull $CI_REGISTRY_IMAGE:latest || true
+    # Build with cache-from for faster builds and inline cache for future builds
+    - docker build
+      --cache-from $CI_REGISTRY_IMAGE:latest
+      --build-arg BUILDKIT_INLINE_CACHE=1
+      -f k8s/Dockerfile
+      -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
+      -t $CI_REGISTRY_IMAGE:latest
+      .
     - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
     - docker push $CI_REGISTRY_IMAGE:latest
   rules: