Add Docker support and configure Dependabot for Docker updates

Introduce a Dockerfile for containerized environments and add a .dockerignore file to exclude unnecessary files. Also, update dependabot.yml to include daily checks for Docker image updates.

Author: coordt

.dockerignore

@@ -0,0 +1,12 @@
+.*
+bump_my_version.egg-info/
+docs/
+overrides/
+test-reports/
+tests/
+tools/
+*.yaml
+CODEOWNERS
+Dockerfile
+Makefile
+MANIFEST.in

.github/dependabot.yml

@@ -11,3 +11,8 @@ updates:
           - "*"  # Group all Actions updates into a single larger pull request
     schedule:
       interval: weekly
+
+  - package-ecosystem: docker
+    directory: /
+    schedule:
+      interval: "daily" # Update Docker tags daily

Dockerfile

@@ -0,0 +1,35 @@
+FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS builder
+
+ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
+
+WORKDIR /app
+
+COPY pyproject.toml /app/pyproject.toml
+COPY uv.lock /app/uv.lock
+
+RUN --mount=type=cache,target=/root/.cache/uv \
+#    --mount=type=bind,source=uv.lock,target=uv.lock \
+#    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
+    uv sync --frozen --no-install-project --no-dev
+ADD . /app
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv sync --frozen --no-dev
+
+FROM python:3.12-slim-bookworm
+
+ARG USERNAME=app
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Add a non-root user and group
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
+
+COPY --from=builder --chown=$USER_UID:$USER_GID /app /app
+USER $USERNAME
+WORKDIR /project
+
+# Place executables in the environment at the front of the path
+ENV PATH="/app/.venv/bin:$PATH"
+
+ENTRYPOINT ["bump-my-version"]