test BUILD_DATE generation

.drone.jsonnet

@@ -64,6 +64,9 @@ local PipelineBuildContainer(arch='amd64') = {
         repo: 'thegeeklab/${DRONE_REPO_NAME}',
         username: { from_secret: 'docker_username' },
         password: { from_secret: 'docker_password' },
+        build_args: [
+          'BUILD_DATE=$$(date --rfc-3339=seconds)',
+        ],
       },
       when: {
         ref: ['refs/heads/main', 'refs/tags/**'],

.drone.yml

@@ -57,6 +57,8 @@ steps:
 - name: publish-dockerhub
   image: thegeeklab/drone-docker-buildx:20
   settings:
+    build_args:
+    - BUILD_DATE=$$(date --rfc-3339=seconds)
     dockerfile: Dockerfile.amd64
     password:
       from_secret: docker_password
@@ -135,6 +137,8 @@ steps:
 - name: publish-dockerhub
   image: thegeeklab/drone-docker-buildx:20
   settings:
+    build_args:
+    - BUILD_DATE=$$(date --rfc-3339=seconds)
     dockerfile: Dockerfile.arm64
     password:
       from_secret: docker_password
@@ -213,6 +217,8 @@ steps:
 - name: publish-dockerhub
   image: thegeeklab/drone-docker-buildx:20
   settings:
+    build_args:
+    - BUILD_DATE=$$(date --rfc-3339=seconds)
     dockerfile: Dockerfile.arm
     password:
       from_secret: docker_password
@@ -346,6 +352,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: b461e1964e0b2ac5b9154b81fa293d6dc99a082e63987d90a4e441b1667d26c8
+hmac: 22ccba5c75de7c2c8bbccd66f0c7c2550d6d4edf6610bded6adc8d8668e19605
 
 ...

Dockerfile.amd64

@@ -1,15 +1,17 @@
 FROM amd64/alpine:3.13@sha256:d0710affa17fad5f466a70159cc458227bd25d4afb39514ef662ead3e6c99515
 
+ARG GOMPLATE_VERSION
+ARG SUPERCRONIC_VERSION
+ARG URL_PARSER_VERSION
+ARG BUILD_DATE
+
 LABEL maintainer="Robert Kaussow <mail@thegeeklab.de>"
 LABEL org.opencontainers.image.authors="Robert Kaussow <mail@thegeeklab.de>"
 LABEL org.opencontainers.image.title="alpine"
 LABEL org.opencontainers.image.url="https://gitea.rknet.org/docker/alpine"
 LABEL org.opencontainers.image.source="https://gitea.rknet.org/docker/alpine"
 LABEL org.opencontainers.image.documentation="https://gitea.rknet.org/docker/alpine"
-
-ARG GOMPLATE_VERSION
-ARG SUPERCRONIC_VERSION
-ARG URL_PARSER_VERSION
+LABEL org.opencontainers.image.created="${BUILD_DATE}"
 
 # renovate: datasource=github-releases depName=hairyhenderson/gomplate
 ENV GOMPLATE_VERSION="${GOMPLATE_VERSION:-v3.8.0}"