refactor(management): add hadolint to lefthook's hook

.lefthook.yml

@@ -1,21 +1,36 @@
+assert_lefthook_installed: true
 no_tty: true
 
 lint:
   parallel: true
   commands:
+    hadolint: &hadolint
+      # The official docker image is based on scratch and only takes only one
+      # input file at a time. I have no clue how to fix that for now so let's
+      # just use the local command.
+      glob: "*Dockerfile*"
+      run: hadolint {all_files}
     yamllint: &yamllint
       glob: "*.{yaml,yml}"
       run: >-
         docker run --rm -v "$PWD:/code" 'registry.gitlab.com/pipeline-components/yamllint:latest'
-        yamllint '.'
+        yamllint {all_files}
 
 pre-commit:
   parallel: true
   commands:
+    hadolint:
+      <<: *hadolint
+      run: hadolint {staged_files}
     yamllint:
       <<: *yamllint
+      run: >-
+        docker run --rm -v "$PWD:/code" 'registry.gitlab.com/pipeline-components/yamllint:latest'
+        yamllint {staged_files}
 
-# commit-msg:
-#   commands:
-#     commitlint:
-#       run: commitlint --edit
+commit-msg:
+  commands:
+    commitlint:
+      # No official docker image available for now, falling back to the local
+      # command.
+      run: commitlint --edit

knowledge base/lefthook.md

@@ -37,13 +37,15 @@ lefthook add -dv 'commit-msg'
 # Execute groups of hooks.
 lefthook run 'pre-push'
 lefthook run -v 'lint' --all-files
-lefthook run 'pre-commit' -n --commands 'lint' --files 'lefthook.yml'
+lefthook run 'pre-commit' -n --commands 'hadolint' --files 'lefthook.yml'
 
 # Remove configured hooks from the current git repository.
 lefthook uninstall
 lefthook uninstall -cv
 ```
 
+Uses the [glob library] for glob patterns.
+
 ## Configuration
 
 Configuration files can be written in JSON, TOML or YAML.<br/>
@@ -93,3 +95,6 @@ All the references in the [further readings] section, plus the following:
 [configuration]: https://github.com/evilmartians/lefthook/blob/master/docs/configuration.md
 [github]: https://github.com/evilmartians/lefthook
 [lefthook: knock your team's code back into shape]: https://evilmartians.com/chronicles/lefthook-knock-your-teams-code-back-into-shape
+
+<!-- Others -->
+[glob library]: https://github.com/gobwas/glob