ci: run lint and validate tools locally

.github/workflows/ci.yaml

@@ -33,11 +33,12 @@ jobs:
             exit 0
           fi
 
-          docker run --rm \
-            -v "$PWD:/work" \
-            -w /work \
-            node:22-alpine \
-            sh -lc 'npx --yes prettier@3 --check --ignore-unknown "$@"' sh "${prettier_files[@]}"
+          command -v prettier >/dev/null 2>&1 || {
+            echo "prettier is required on PATH but was not found."
+            exit 1
+          }
+
+          prettier --check --ignore-unknown "${prettier_files[@]}"
 
   lint-ruff:
     runs-on: [self-hosted, linux, arch, homelab]
@@ -48,11 +49,12 @@ jobs:
       - name: Lint Python with Ruff
         shell: bash
         run: |
-          docker run --rm \
-            -v "$PWD:/work" \
-            -w /work \
-            ghcr.io/astral-sh/ruff:latest \
-            check .
+          command -v ruff >/dev/null 2>&1 || {
+            echo "ruff is required on PATH but was not found."
+            exit 1
+          }
+
+          ruff check .
 
   lint-yaml:
     runs-on: [self-hosted, linux, arch, homelab]
@@ -63,11 +65,12 @@ jobs:
       - name: Lint YAML syntax
         shell: bash
         run: |
-          docker run --rm \
-            -v "$PWD:/work" \
-            -w /work \
-            cytopia/yamllint:latest \
-            -c .yamllint .
+          command -v yamllint >/dev/null 2>&1 || {
+            echo "yamllint is required on PATH but was not found."
+            exit 1
+          }
+
+          yamllint -c .yamllint .
 
   lint-dockerfiles:
     runs-on: [self-hosted, linux, arch, homelab]
@@ -87,12 +90,12 @@ jobs:
             exit 0
           fi
 
-          docker run --rm \
-            -v "$PWD:/work" \
-            -w /work \
-            --entrypoint hadolint \
-            hadolint/hadolint:latest-debian \
-            -c .hadolint.yaml "${dockerfiles[@]}"
+          command -v hadolint >/dev/null 2>&1 || {
+            echo "hadolint is required on PATH but was not found."
+            exit 1
+          }
+
+          hadolint -c .hadolint.yaml "${dockerfiles[@]}"
 
   validate:
     runs-on: [self-hosted, linux, arch, homelab]
@@ -113,14 +116,12 @@ jobs:
             exit 0
           fi
 
-          docker run --rm \
-            -v "$PWD:/work" \
-            -w /work \
-            ghcr.io/yannh/kubeconform:latest \
-            -strict \
-            -ignore-missing-schemas \
-            -summary \
-            "${manifests[@]}"
+          command -v kubeconform >/dev/null 2>&1 || {
+            echo "kubeconform is required on PATH but was not found."
+            exit 1
+          }
+
+          kubeconform -strict -ignore-missing-schemas -summary "${manifests[@]}"
 
   publish:
     needs: [lint-prettier, lint-ruff, lint-yaml, lint-dockerfiles, validate]