Add github action

.github/workflows/tests.yml

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+name: Tests
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  basic:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - name: Build test image
+        run: docker build -f ci/Dockerfile -t cold-tests .
+      - name: Run basic tests
+        run: docker run --rm cold-tests

ci/Dockerfile

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+# Based on https://github.com/stampes/CISimple
+FROM docker.io/dyalog/dyalog
+
+USER root
+RUN apt-get update && apt-get install -y --no-install-recommends binutils \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /cold
+COPY --chown=dyalog:dyalog ws/ ws/
+COPY --chown=dyalog:dyalog lnk/ lnk/
+COPY --chown=dyalog:dyalog tests/ tests/
+COPY --chown=dyalog:dyalog ci/tests.aplf ci/tests.aplf
+
+ENV LOAD=/cold/ci/tests.aplf
+USER dyalog

ci/tests.aplf

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+tests;root
+:Trap 0
+    root←⊃1 ⎕NPARTS''
+    _←⎕SE.Link.Import # (root,'ws')
+    #.UT.PROJECT_ROOT←root
+    _←#.UT.Run'B -serial'
+:Else
+    ⎕←⎕DMX.DM
+    ⎕OFF 1
+:EndTrap
+⎕OFF 0