Added curl for health checking

.gitlab-ci.yml

@@ -0,0 +1,73 @@
+stages:
+  - build
+
+.build:
+  image: docker:20.10.16
+  services:
+    - name: docker:20.10.16-dind
+      alias: docker
+  variables:
+    DOCKER_HOST: tcp://docker:2376
+    DOCKER_TLS_CERTDIR: "/certs"
+    DOCKER_TLS_VERIFY: 1
+    DOCKER_CERT_PATH: "/certs/client"
+    DOCKER_DRIVER: "overlay"
+  before_script:
+    - "docker login ${CI_REGISTRY} -u gitlab-ci-token -p ${CI_JOB_TOKEN}"
+  after_script:
+    - "docker logout ${CI_REGISTRY}"
+  
+build_3_18:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.18" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:latest -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.18 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:latest
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.18
+
+build_3_16:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.16" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.16 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.16
+
+build_3_13:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.13" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.13 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.13
+
+build_3_10:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.10" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.10 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.10
+
+build_3_9:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.9" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.9 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.9
+
+build_3_5:
+  stage: build
+  extends: .build
+  only:
+    - master
+  script:
+    - DOCKER_BUILDKIT=1 docker image build --build-arg="ALPINE_VERSION=3.5" -t ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.5 .
+    - docker image push ${CI_REGISTRY}/${CI_PROJECT_PATH}:3.5

Dockerfile

@@ -16,7 +16,7 @@ RUN echo "${ALPINE_MIRROR}/v${ALPINE_VERSION}/community" >> /etc/apk/repositorie
 # INSTALL BASE DEPENDENCIES
 RUN --mount=type=cache,target=/var/cache/apk \
     apk add --update \
-    bash libcap tzdata
+    bash libcap tzdata curl
 
 # SET LOCAL TIMEZONE
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone