feat(e2e): add Dockerfile and entrypoint script for testing deb packages

Signed-off-by: Arian Nasr <arian@2ari.ca>

Dockerfile.test

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+# Navidome-Uploader Dockerfile for testing .deb packages
+# Arian Nasr
+# May 31, 2026
+
+FROM debian:stable
+
+# Prevent interactive prompts
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y \
+    curl \
+    python3 \
+    python3-venv \
+    python3-pip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy the built deb package into the container
+COPY output/*.deb /tmp/navidrome-uploader.deb
+
+RUN apt-get update && \
+    apt-get install -y -f /tmp/navidrome-uploader.deb && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN mkdir -p /opt/navidrome/music && \
+    chown -R navidrome-uploader:navidrome-uploader /opt/navidrome/music
+
+COPY e2e/ /e2e/
+
+RUN python3 -m venv /e2e/venv && \
+    /e2e/venv/bin/pip install --no-cache-dir -r /e2e/requirements.txt
+
+RUN chmod +x /e2e/test-entrypoint.sh
+
+WORKDIR /e2e
+
+ENTRYPOINT ["/e2e/test-entrypoint.sh"]

e2e/test-entrypoint.sh

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+#!/bin/sh
+
+export NAVIDROME_MUSIC_FOLDER="/opt/navidrome/music"
+export BASE_URL="http://127.0.0.1:5001"
+
+# Start the app manually since systemd isn't running in the container
+cd /opt/navidrome-uploader
+su -s /bin/sh navidrome-uploader -c "/opt/navidrome-uploader/venv/bin/gunicorn --no-control-socket -c gunicorn.conf.py main:app" &
+
+APP_PID=$!
+
+TIMEOUT=30
+SERVICE_UP=0
+
+while [ $TIMEOUT -gt 0 ]; do
+    if curl -s $BASE_URL/ping | grep -q "pong"; then
+        SERVICE_UP=1
+        break
+    fi
+    sleep 1
+    TIMEOUT=$((TIMEOUT-1))
+done
+
+if [ $SERVICE_UP -eq 0 ]; then
+    echo "Error: Service failed to start within the timeout period"
+    kill $APP_PID
+    exit 1
+fi
+
+cd /e2e
+
+/e2e/venv/bin/pytest unit/api/test_api.py
+
+# Capture the exit code of pytest
+TEST_EXIT_CODE=$?
+
+kill $APP_PID
+
+exit $TEST_EXIT_CODE