Add image build action on prs and pushes

.github/workflows/build_image.yaml

@@ -0,0 +1,14 @@
+on: [ push, pull_request ]
+name: Build Image
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build the image
+        run: docker build -t eib:dev .