Merge pull request #18 from lsst-uk/build_container_action

Build container action

.github/workflows/docker-image.yml

@@ -0,0 +1,20 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build the Docker image
+      run: docker build . --file echo-side/containers/basic_env/Dockerfile --tag ghcr.io/lsst-uk/csd3-echo-somerville:$(date +%Y%m%d) --tag ghcr.io/lsst-uk/csd3-echo-somerville:latest
+    - name: Push the Docker image
+      run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u lsst-uk --password-stdin && docker push ghcr.io/lsst-uk/csd3-echo-somerville:$(date +%Y%m%d) && docker push ghcr.io/lsst-uk/csd3-echo-somerville:latest