use kaniko to build container

.editorconfig

@@ -1,9 +0,0 @@
-root = true
-
-[*]
-end_of_line = lf
-charset = utf-8
-trim_trailing_whitespace = true
-insert_final_newline = true
-indent_style = space
-indent_size = 4

.gitlab-ci.yml

@@ -1,18 +1,22 @@
 stages:
   - build
-  - trigger
 
 variables:
-  IMAGE_NAME: thallian/php8-fpm
-  CI_BUILD_ARCHS: "linux/amd64,linux/arm64"
-  DOWNSTREAM_PROJECTS: "49 51"
+  CI_REGISTRY_IMAGE: thallian/php8-fpm
+  DOWNSTREAM_PROJECTS: ""
 
 build:
   stage: build
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
   script:
-    - docker login -u $DOCKER_USER -p $DOCKER_PASSWORD $DOCKER_REGISTRY
-    - docker buildx build --platform "$CI_BUILD_ARCHS" --progress plain --pull --tag "$IMAGE_NAME:$CI_COMMIT_SHA" --tag "$IMAGE_NAME:$CI_COMMIT_REF_NAME" --tag "$IMAGE_NAME:latest" --push .
-    - |
-      for proj in $DOWNSTREAM_PROJECTS; do
-        curl --request POST --form "token=$CI_JOB_TOKEN" --form ref=master $CI_API_V4_URL/projects/$proj/trigger/pipeline
-      done
+    - mkdir -p /kaniko/.docker
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"auth\":\"$(printf "%s:%s" "$CI_REGISTRY_USER" "$CI_REGISTRY_PASSWORD" | base64 | tr -d '\n')\"}}}" > /kaniko/.docker/config.json
+    - >-
+      /kaniko/executor
+      --context "$CI_PROJECT_DIR"
+      --dockerfile "$CI_PROJECT_DIR/Dockerfile"
+      --destination "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHA"
+      --destination "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME"
+      --destination "$CI_REGISTRY_IMAGE:latest"

rootfs/etc/s6-overlay/s6-rc.d/php8-fpm/dependencies

@@ -0,0 +1 @@
+confd

rootfs/etc/s6-overlay/s6-rc.d/php8-fpm/type

@@ -0,0 +1 @@
+longrun