Add basic smoke test

This checks that python3.10 has been installed. In future we could extend this
to include R / R packages, but that's expected to change very soon.

.github/workflows/main.yml

@@ -13,7 +13,7 @@ on:
     branches: [main]
 
 jobs:
-  build:
+  build-and-test:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -28,6 +28,9 @@ jobs:
       - name: Build docker image
         run: just build
 
+      - name: Test docker image
+        run: just smoke-test
+
       - name: Save docker image
         run: |
           docker save research-template | gzip > /tmp/research-template.tar.gz

justfile

@@ -6,3 +6,6 @@ default:
 
 build:
     docker build .
+
+smoke-test:
+    docker run --rm research-template ls /opt/venv/bin/python3.10