fix(ci-runner): use custom node22-docker image for CI jobs

Switch all jobs to run inside git.byting-pandas.ninja/ci/node22-docker,
which bundles Node 22, Docker CLI, and docker-compose. Removes the
actions/setup-node step since Node is already provided by the image.

.gitea/workflows/quality-gate.yml

@@ -10,13 +10,11 @@ on:
 jobs:
   lint-and-format:
     runs-on: ubuntu-docker-dind
+    container:
+      image: git.byting-pandas.ninja/ci/node22-docker:latest
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "22"
-
       - run: corepack enable
       - run: corepack prepare pnpm@11.11.0 --activate
 
@@ -30,15 +28,13 @@ jobs:
 
   changeset-check:
     runs-on: ubuntu-docker-dind
+    container:
+      image: git.byting-pandas.ninja/ci/node22-docker:latest
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "22"
-
       - run: corepack enable
       - run: corepack prepare pnpm@11.11.0 --activate
 
@@ -50,13 +46,11 @@ jobs:
 
   unit-tests:
     runs-on: ubuntu-docker-dind
+    container:
+      image: git.byting-pandas.ninja/ci/node22-docker:latest
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "22"
-
       - run: corepack enable
       - run: corepack prepare pnpm@11.11.0 --activate
 
@@ -67,13 +61,11 @@ jobs:
 
   component-tests:
     runs-on: ubuntu-docker-dind
+    container:
+      image: git.byting-pandas.ninja/ci/node22-docker:latest
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "22"
-
       - run: corepack enable
       - run: corepack prepare pnpm@11.11.0 --activate