ci: build locally with kaniko + push to DockerHub

* add hadolint Dockerfile linter step
* update Dockerfile to implement hadolint suggestions (cbp)
* switch to immawanderer/drone-kaniko as the kaniko flavour of choice
* add a note to README about the DH builds issue situation

.drone.yml

@@ -1,23 +1,64 @@
 ---
 kind: pipeline
-name: dockerhub-build-trigger
+type: docker
+name: testing
 
 platform:
+  os: linux
   arch: amd64
 
-clone:
-  disable: true
-
 steps:
-- name: call webhook
+- name: hadolint
   pull: always
-  image: curlimages/curl:latest
-  environment:
-    ENDPOINT:
-      from_secret: dockerhub_endpoint
+  image: hadolint/hadolint:v1.23.0-8-gb01c5a9-alpine
   commands:
-  - curl -s -X POST $ENDPOINT
+  - hadolint --version
+  - hadolint Dockerfile
+  when:
+    ref:
+    - refs/heads/master
+    - "refs/heads/feature-**"
+    - "refs/pull/**"
+    - "refs/tags/**"
+    event:
+      exclude: [cron]
 
+- name: kaniko-build
+  pull: always
+  image: immawanderer/drone-kaniko:efd19c50
+  settings:
+    dockerfile: Dockerfile
+    context: .
+  when:
+    ref:
+    - "refs/heads/feature-**"
+    - "refs/pull/**"
+    - "refs/tags/**"
+    event:
+      exclude: [cron]
+
+- name: kaniko-publish
+  pull: always
+  image: immawanderer/drone-kaniko:efd19c50
+  settings:
+    dockerfile: Dockerfile
+    context: .
+    tags:
+    - latest
+    - linux-amd64
+    - ${DRONE_COMMIT_SHA:0:8}
+    repo: immawanderer/archlinux-hugo
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+  when:
+    ref:
+    - refs/heads/master
+    event:
+      exclude: [pull_request, tag]
+trigger:
+  event: [push, pull_request, cron, tag]
 
 ---
 kind: pipeline
@@ -41,7 +82,7 @@ trigger:
     - failure
 
 depends_on:
-  - dockerhub-build-trigger
+- testing
 
 steps:
   - name: discord
@@ -77,7 +118,7 @@ trigger:
     - failure
 
 depends_on:
-  - dockerhub-build-trigger
+- testing
 
 steps:
   - name: discord

Dockerfile

@@ -1,4 +1,4 @@
-FROM immawanderer/archlinux:latest
+FROM immawanderer/archlinux:linux-amd64
 
 ENV HUGO_VERSION 0.82.1
 
@@ -15,15 +15,15 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
 ADD https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.tar.gz /tmp/hugo.tar.gz
 
 WORKDIR /tmp/
-RUN pacman -Syu --noconfirm --needed git && pacman --noconfirm -R $(pacman -Qdtq) || true
+RUN pacman -Syu --noconfirm --needed git
+RUN pacman --noconfirm -Rn "$(pacman -Qdtq)" || true
 RUN bsdtar xfv /tmp/hugo.tar.gz && rm -v /tmp/hugo.tar.gz README.md LICENSE \
     && chmod +x /tmp/hugo \
     && mkdir -pv /usr/local/bin \
     && mv -v /tmp/hugo /usr/local/bin/
 RUN pacman -Scc && rm -rf /var/cache/pacman/* /var/lib/pacman/sync/* \
-    && rm -r /usr/share/zoneinfo/* ; \
-    rm -r /usr/share/i18n/* ;rm -r /usr/include/* ; \
+    && rm -rf /usr/share/zoneinfo/* ; \
+    rm -rf /usr/share/i18n/* ;rm -rf /usr/include/* ; \
     find /. -name "*~" -type f -delete; \
-    find /usr/share/terminfo/. ! -name "*xterm*" ! -name "*screen*" ! -name "*screen*" -type f -delete; \
-    rm -rv /tmp/* || true
+    find /usr/share/terminfo/. ! -name "*xterm*" ! -name "*screen*" ! -name "*screen*" -type f -delete
 WORKDIR /

README.md

@@ -7,6 +7,11 @@
 
 This repository provides the Dockerfile to create a Docker image used for web developent using [Hugo](https://gohugo.io) website building framework.
 
+## :warning: :construction: DockerHub issue :construction: :warning:
+unless you're running Arch (or a Fedora 34+ or some reasonably recent thing) as your host OS, please make sure you read through the following issue write-up (since DH issue affects the base image it affects this one, too) \
+⇒ https://git.dotya.ml/wanderer/docker-archlinux/issues/1 \
+:warning: :construction: :construction: :construction: :warning:
+
 The image is rebuilt <del>approximately every hour</del> nightly to ensure it always has the latest packages.
 
 push mirror lives in [this GitHub repo](https://github.com/wULLSnpAXbWZGYDYyhWTKKspEQoaYxXyhoisqHf/docker-archlinux-hugo)