chore: added multistage using a builder with node modules cached.

.github/workflows/build-builder.yaml

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+#
+# Copyright (C) 2025 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: build-builder
+
+on:
+  push:
+    branches:
+    - main
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Build Image
+        id: build-image
+        uses: redhat-actions/buildah-build@7a95fa7ee0f02d552a32753e7414641a04307056 #v2.13
+        with:
+          image: ghcr.io/${{ github.repository }}-builder
+          tags: latest ${{ github.sha }}
+          containerfiles: |
+            ./oci/Containerfile.builder
+
+      - name: Push To Registry
+        uses: redhat-actions/push-to-registry@5ed88d269cf581ea9ef6dd6806d01562096bee9c #v2.8
+        with:
+          image: ${{ steps.build-image.outputs.image }}
+          tags: ${{ steps.build-image.outputs.tags }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/build-extension.yaml

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+#
+# Copyright (C) 2025 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: build-extension
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    name: build
+    runs-on: ubuntu-24.04
+    env:
+      VERSION: "latest"
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+    - name: Set extension image name
+      if: github.event_name == 'pull_request' 
+      run: echo "VERSION=pr-${{ github.event.number }}" >> $GITHUB_ENV
+
+    - name: Build extension
+      env:
+        IMG: ghcr.io/crc-org/podman-desktop-extension-macadam:${VERSION}
+      shell: bash
+      run: |
+        podman build -t ${IMG} -f oci/Containerfile.multistage .
+        podman save -m -o podman-desktop-extension-macadam.tar ${IMG}
+        echo ${IMG} > podman-desktop-extension-macadam.image
+
+    - name: Upload extension oci flatten images
+      uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+      with:
+        name: podman-desktop-extension-macadam
+        path: podman-desktop-extension-macadam*
+
+  push:
+    name: push
+    if: github.event_name == 'push' 
+    needs: build
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - name: Download extension oci flatten images
+      uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+      with:
+        name: podman-desktop-extension-macadam
+
+    - name: Log in to ghcr.io
+      uses: redhat-actions/podman-login@4934294ad0449894bcd1e9f191899d7292469603 # v1.7
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Push image for Release
+      shell: bash
+      run: |
+        podman load -i podman-desktop-extension-macadam.tar
+        podman push ghcr.io/crc-org/podman-desktop-extension-macadam:latest
+
+
+
+

.github/workflows/push-extension-pr.yml

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+#
+# Copyright (C) 2025 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: push-extension-pr
+
+on:
+  workflow_run:
+    workflows: 
+    - build-extension
+    types:
+      - completed
+
+jobs:
+  push:
+    name: push
+    if: |
+      github.event.workflow_run.conclusion == 'success' &&
+      github.event.workflow_run.event == 'pull_request'
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - name: Download extension oci flatten images
+      uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+      with:
+        name: podman-desktop-extension-macadam
+        run-id: ${{ github.event.workflow_run.id }}
+        github-token: ${{ github.token }}
+
+    - name: Get image
+      shell: bash
+      run: |
+        echo "IMAGE=$(cat podman-desktop-extension-macadam.image)" >> "$GITHUB_ENV"
+
+    - name: Log in to ghcr.io
+      uses: redhat-actions/podman-login@4934294ad0449894bcd1e9f191899d7292469603 # v1.7
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Push image for Release
+      shell: bash
+      run: |
+        podman load -i podman-desktop-extension-macadam.tar
+        podman push ${IMAGE}

oci/Containerfile.builder

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+#
+# Copyright (C) 2025 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+FROM registry.access.redhat.com/ubi9/nodejs-20
+
+COPY package.json .
+
+RUN npm i -g [email protected] \
+    && npm install yarn --global \
+    && yarn --frozen-lockfile --network-timeout 180000

oci/Containerfile.multistage

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+#
+# Copyright (C) 2025 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+FROM ghcr.io/crc-org/podman-desktop-extension-macadam-builder:latest AS builder
+
+COPY . .
+
+RUN yarn --network-timeout 180000 \
+  && yarn build
+
+FROM scratch
+
+LABEL org.opencontainers.image.title="Macadam extension" \
+      org.opencontainers.image.description="Example of Macadam extension" \
+      org.opencontainers.image.vendor="podman-desktop" \
+      io.podman-desktop.api.version=">= 1.10.0"
+
+COPY package.json /extension/
+COPY LICENSE /extension/
+COPY icon.png /extension/
+COPY README.md /extension/
+COPY --from=builder /opt/app-root/src/dist /extension/dist
+COPY --from=builder /opt/app-root/src/node_modules/ssh2/ /extension/node_modules/ssh2