Add docker image for kubernetes helm chart

docker/kubernetes/Dockerfile

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+FROM python:3.13-slim AS builder
+
+ENV PYTHONUNBUFFERED=1
+ENV DEBIAN_FRONTEND=noninteractive
+
+#======================================================
+# Builder - Create virtualenv for Pulsar
+#======================================================
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends apt-transport-https \
+    # Install packages
+    && apt-get update \
+    && apt-get install -y --no-install-recommends gcc \
+        libcurl4-openssl-dev \
+        bzip2 virtualenv \
+    && mkdir /pulsar
+
+WORKDIR /pulsar
+
+COPY pulsar_app-*-py2.py3-none-any.whl .
+COPY requirements.txt .
+
+# Install Pulsar Python requirements
+RUN virtualenv .venv \
+    && . .venv/bin/activate \
+    && pip install wheel pykube-ng \
+    && pip install -r requirements.txt Paste \
+    && pip install `ls pulsar_app-*-py2.py3-none-any.whl`\[galaxy_extended_metadata,web,amqp\]
+
+# generate default pulsar config
+RUN .venv/bin/pulsar-config --host 0.0.0.0
+
+#======================================================
+# Final image - Copy virtualenv for Pulsar
+#======================================================
+FROM python:3.13-slim
+
+ENV PYTHONUNBUFFERED=1
+ENV DEBIAN_FRONTEND=noninteractive
+ENV PULSAR_CONFIG_PRIVATE_TOKEN=change_me
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        libcurl4-openssl-dev \
+        bzip2 virtualenv \
+    && adduser --disabled-password --gecos '' pulsar \
+    && mkdir /pulsar \
+    && chown pulsar:pulsar /pulsar
+
+WORKDIR /pulsar
+COPY --chown=pulsar:pulsar --from=builder /pulsar .
+
+USER pulsar
+
+EXPOSE 8913
+
+CMD [".venv/bin/pulsar"]

docker/kubernetes/Makefile

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+
+
+dist:
+	cd ../..; make dist; cp dist/pulsar*whl docker/kubernetes; cp requirements.txt docker/kubernetes
+
+docker-image:
+	docker build -t 'galaxy/pulsar-kubernetes:0.15.7' .
+
+all: dist docker-image