fix Dockerfile runtime

Author: gilesknap

.dockerignore

@@ -0,0 +1,3 @@
+Dockerfile
+README.md
+tests\**

.github/workflows/_test.yml

@@ -16,7 +16,7 @@ on:
 env:
   # https://github.com/pytest-dev/pytest/issues/2042
   PY_IGNORE_IMPORTMISMATCH: "1"
-  ENV QT_QPA_PLATFORM: offscreen
+  QT_QPA_PLATFORM: offscreen
 
 jobs:
   run:

Dockerfile

@@ -1,16 +1,15 @@
 # The devcontainer should use the developer target and run as root with podman
 # or docker with user namespaces.
 ARG PYTHON_VERSION=3.11
-FROM python:${PYTHON_VERSION} as system
+FROM python:${PYTHON_VERSION} as developer
 
-# Add any system dependencies for developer and runtime targets
+# Add any system dependencies for the developer/build environment here
 RUN apt-get update && apt-get install -y --no-install-recommends \
     graphviz \
+    libglib2.0-0 \
     libqt5gui5 libxcb-xinerama0 \
     && rm -rf /var/lib/apt/lists/*
 
-FROM system as developer
-
 # Set up a virtual environment and put it in PATH
 RUN python -m venv /venv
 ENV PATH=/venv/bin:$PATH
@@ -25,11 +24,16 @@ RUN pip install .
 
 # The runtime stage copies the built venv into a slim runtime container
 FROM python:${PYTHON_VERSION}-slim as runtime
+
 # Add apt-get system dependecies for runtime here if needed
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libqt5gui5 libxcb-xinerama0 \
+    && rm -rf /var/lib/apt/lists/*
+
 COPY --from=build /venv/ /venv/
 ENV PATH=/venv/bin:$PATH
 
 # change this entrypoint if it is not the same as the repo
 ENTRYPOINT ["dls-pmac-control"]
-CMD ["--version"]
+