LCORE-168: Add image building - Containerfile and GH Actions

.github/workflows/build.yaml

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+name: Build image
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install podman
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install podman
+      - name: Verify podman
+        run: podman --version
+      - name: Build image
+        run: podman build -t lightspeed-stack:latest .
+

Containerfile

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+# vim: set filetype=dockerfile
+FROM registry.access.redhat.com/ubi9/ubi-minimal
+
+ARG APP_ROOT=/app-root
+
+RUN microdnf install -y --nodocs --setopt=keepcache=0 --setopt=tsflags=nodocs \
+    python3.11 python3.11-devel python3.11-pip
+
+# PYTHONDONTWRITEBYTECODE 1 : disable the generation of .pyc
+# PYTHONUNBUFFERED 1 : force the stdout and stderr streams to be unbuffered
+# PYTHONCOERCECLOCALE 0, PYTHONUTF8 1 : skip legacy locales and use UTF-8 mode
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PYTHONCOERCECLOCALE=0 \
+    PYTHONUTF8=1 \
+    PYTHONIOENCODING=UTF-8 \
+    LANG=en_US.UTF-8 \
+    PIP_NO_CACHE_DIR=off
+
+WORKDIR /app-root
+
+# Add explicit files and directories
+# (avoid accidental inclusion of local directories or env files or credentials)
+COPY pyproject.toml LICENSE README.md ./
+
+COPY src ./src
+
+RUN pip3.11 install --no-cache-dir .
+
+# this directory is checked by ecosystem-cert-preflight-checks task in Konflux
+COPY LICENSE /licenses/
+
+# Run the application
+EXPOSE 8080
+CMD ["python3.11", "src/lightspeed_stack.py"]
+
+LABEL vendor="Red Hat, Inc."
+
+
+# no-root user is checked in Konflux
+USER 1001