ci: add platform selection input and npm timeout build args

- Add `platform` workflow input to allow targeting amd64, arm64, or both
- Update Docker build steps to use dynamic platform selection based on input
- Add NPM fetch timeout build args to frontend build to improve reliability
- Add `act` binary for local GitHub Actions testing

Author: delcroip

.github/workflows/build.yml

@@ -19,7 +19,15 @@ on:
           - be
           - fe
           - all
-
+      platform:
+        description: 'Target platform'
+        required: false
+        default: 'all'
+        type: choice
+        options:
+          - amd64
+          - arm64
+          - all
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -183,7 +191,7 @@ jobs:
         with:
           context: ${{ env.BUILD_DIR_BE }}
           file: ${{ env.BUILD_DIR_BE }}/Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ inputs.platform == 'all' && 'linux/amd64,linux/arm64' || format('linux/{0}', inputs.platform) }}
           push: true
           tags: |
             ghcr.io/openimis/openimis-be:${{ env.TAG_BE }}
@@ -196,9 +204,13 @@ jobs:
         with:
           context: ${{ env.BUILD_DIR_FE }}
           file: ${{ env.BUILD_DIR_FE }}/Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ inputs.platform == 'all' && 'linux/amd64,linux/arm64' || format('linux/{0}', inputs.platform) }}
           push: true
           tags: |
             ghcr.io/openimis/openimis-fe:${{ env.TAG_FE }}
           cache-from: type=gha,scope=solution-${{ env.LOWER_SOL }}-fe
-          cache-to: type=gha,mode=max,scope=solution-${{ env.LOWER_SOL }}-fe
+          cache-to: type=gha,mode=max,scope=solution-${{ env.LOWER_SOL }}-fe
+          build-args: |
+            NPM_CONFIG_FETCH_TIMEOUT=600000
+            NPM_CONFIG_FETCH_RETRY_MINTIMEOUT=30000
+            NPM_CONFIG_FETCH_RETRY_MAXTIMEOUT=120000