ci: build and push docker image to GHCR, misc CI improvements (#79)

Author: cleot

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      all-github-actions:
+        patterns:
+          - "*"
+    schedule:
+      interval: "monthly"
+      day: "monday"
+      time: "08:30"
+      timezone: "Europe/Vienna"
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "github-actions"
+    assignees:
+      - "cleot" # devops

.github/workflows/build.yml

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+name: CI
+
+on:
+  push:
+    branches: ["master", "dev"]
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    name: Validate (lint, test, build)
+    runs-on: ubuntu-latest
+    env:
+      NODE_VERSION: 22
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+
+      - name: Set up Node.js (${{ env.NODE_VERSION }})
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Run tests and generate coverage
+        run: npm run test -- --coverage
+
+      - name: Build
+        run: npm run build
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/ci.yml

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+name: build and push nightly image
+
+on:
+  push:
+    branches:
+      - master
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+    IMAGE_NAME: "bcr-wdc-dashboard-ui"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+
+    - name: Login to GHCR
+      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+    - id: meta
+      name: Metadata
+      uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
+      with:
+        images: |
+          ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=raw,value=nightly
+
+    - id: push
+      name: Build & push ${{ env.IMAGE_NAME }}
+      uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha,scope=${{ github.repository }}/${{ env.IMAGE_NAME }}
+        cache-to: type=gha,mode=max,scope=${{ github.repository }}/${{ env.IMAGE_NAME }}

.github/workflows/nightly.yml

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+name: release tagged image
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+    IMAGE_NAME: "bcr-wdc-dashboard-ui"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+
+    - name: Login to GHCR
+      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+    - id: meta
+      name: Metadata
+      uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
+      with:
+        images: |
+          ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=semver,pattern={{version}}
+
+    - id: push
+      name: Build & push ${{ env.IMAGE_NAME }}
+      uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha,scope=${{ github.repository }}/${{ env.IMAGE_NAME }}
+        cache-to: type=gha,mode=max,scope=${{ github.repository }}/${{ env.IMAGE_NAME }}