refactor: extract jobs from main build workflow

.github/workflows/_build_image.yml

@@ -0,0 +1,42 @@
+name: Build Image
+
+on:
+  workflow_call:
+    inputs:
+      github_ref_name:
+        type: string
+      github_sha:
+        type: string
+    secrets:
+      GITHUB_TOKEN:
+        required: true
+
+jobs:
+  build_image:
+    name: Build image
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install tools
+        uses: jdx/mise-action@v2
+        with:
+          experimental: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Log in to utility account
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-region: eu-west-1
+          role-to-assume: arn:aws:iam::961341524988:role/kitu-github-actions-role
+      - uses: aws-actions/amazon-ecr-login@v2
+        id: login-ecr
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/build-push-action@v6
+        with:
+          push: ${{ inputs.github_ref_name == 'main' }}
+          tags: ${{ steps.login-ecr.outputs.registry }}/kitu:${{ inputs.github_sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/_frontend_tests.yml

@@ -0,0 +1,39 @@
+name: Frontend Tests
+
+on:
+  workflow_call:
+    secrets:
+      GITHUB_TOKEN:
+        required: true
+
+jobs:
+  frontend_tests:
+    name: Frontend tests
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install tools
+        uses: jdx/mise-action@v2
+        with:
+          experimental: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Start DB
+        run: docker compose up -d db
+        working-directory: server
+      - name: Install dependencies
+        run: npm ci
+        working-directory: e2e
+      - name: Install Playwright Browsers
+        run: npx playwright install --with-deps
+        working-directory: e2e
+      - name: Run Playwright tests
+        run: npx playwright test
+        working-directory: e2e
+      - uses: actions/upload-artifact@v4
+        if: ${{ !cancelled() }}
+        with:
+          name: playwright-report
+          path: e2e/playwright-report/
+          retention-days: 30

.github/workflows/_server_tests.yml

@@ -0,0 +1,25 @@
+name: Server Tests
+
+on:
+  workflow_call:
+    secrets:
+      GITHUB_TOKEN:
+        required: true
+
+jobs:
+  server_tests:
+    name: Server tests
+    runs-on: ubuntu-latest
+    env:
+      MISE_ENV: ci
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install tools
+        uses: jdx/mise-action@v2
+        with:
+          experimental: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build with Maven
+        run: mvn -B package --file pom.xml
+        working-directory: server

.github/workflows/build.yml

@@ -86,53 +86,17 @@ jobs:
 
   server_tests:
     name: Server tests
-    runs-on: ubuntu-latest
     needs: update_tools_cache
-    env:
-      MISE_ENV: ci
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install tools
-        uses: jdx/mise-action@v2
-        with:
-          experimental: true
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build with Maven
-        run: mvn -B package --file pom.xml
-        working-directory: server
+    uses: ./.github/workflows/_server_tests.yml
+    secrets:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   frontend_tests:
     name: Frontend tests
-    timeout-minutes: 60
-    runs-on: ubuntu-latest
+    uses: ./.github/workflows/_frontend_tests.yml
     needs: update_tools_cache
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install tools
-        uses: jdx/mise-action@v2
-        with:
-          experimental: true
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Start DB
-        run: docker compose up -d db
-        working-directory: server
-      - name: Install dependencies
-        run: npm ci
-        working-directory: e2e
-      - name: Install Playwright Browsers
-        run: npx playwright install --with-deps
-        working-directory: e2e
-      - name: Run Playwright tests
-        run: npx playwright test
-        working-directory: e2e
-      - uses: actions/upload-artifact@v4
-        if: ${{ !cancelled() }}
-        with:
-          name: playwright-report
-          path: e2e/playwright-report/
-          retention-days: 30
+    secrets:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   lint:
     name: Check code formatting
@@ -151,37 +115,15 @@ jobs:
 
   build_image:
     name: Build image
-    runs-on: ubuntu-latest
+    uses: ./.github/workflows/_build_image.yml
     needs:
       - check_generated_sources
       - server_tests
       - frontend_tests
       - lint
-    permissions:
-      id-token: write
-      contents: read
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install tools
-        uses: jdx/mise-action@v2
-        with:
-          experimental: true
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Log in to utility account
-        uses: aws-actions/configure-aws-credentials@v4
-        with:
-          aws-region: eu-west-1
-          role-to-assume: arn:aws:iam::961341524988:role/kitu-github-actions-role
-      - uses: aws-actions/amazon-ecr-login@v2
-        id: login-ecr
-      - uses: docker/setup-buildx-action@v3
-      - uses: docker/build-push-action@v6
-        with:
-          push: ${{ github.ref_name == 'main' }}
-          tags: ${{ steps.login-ecr.outputs.registry }}/kitu:${{ github.sha }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+    with:
+      github_ref_name: ${{ github.ref_name }}
+      github_sha: ${{ github.sha }}
 
   deploy_util:
     name: Util