Dockerfile

# Use Ubuntu as base for OpenCV package availability  
FROM ubuntu:22.04

# Set working directory
WORKDIR /app

# Install OpenJDK 21 and OpenCV from Ubuntu packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y \
    openjdk-21-jdk \
    maven \
    libopencv-dev \
    libopencv4.5-java \
    python3-opencv \
    wget \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Set JAVA_HOME properly  
ENV JAVA_HOME=/usr/lib/jvm/java-21-openjdk-arm64
ENV PATH="$JAVA_HOME/bin:$PATH"

# Install OpenCV JAR for Maven - system JAR was found during package install
RUN OPENCV_JAR="/usr/share/java/opencv4/opencv-454d.jar" && \
    if [ -f "$OPENCV_JAR" ]; then \
        echo "Using system OpenCV JAR: $OPENCV_JAR" && \
        mvn install:install-file \
            -Dfile="$OPENCV_JAR" \
            -DgroupId=org.opencv \
            -DartifactId=opencv \
            -Dversion=4.12.0-custom \
            -Dpackaging=jar; \
    else \
        echo "System OpenCV JAR not found, using OpenPNP fallback" && \
        mvn dependency:get -Dartifact=org.openpnp:opencv:4.5.1-2 && \
        mvn install:install-file \
            -Dfile=/root/.m2/repository/org/openpnp/opencv/4.5.1-2/opencv-4.5.1-2.jar \
            -DgroupId=org.opencv \
            -DartifactId=opencv \
            -Dversion=4.12.0-custom \
            -Dpackaging=jar; \
    fi

# Update library cache
RUN ldconfig

# Copy project files
COPY pom.xml .
COPY src/ src/

# Build the application
RUN mvn clean package -Pcomplete -Dmaven.test.skip=true

# Copy and setup entrypoint script
COPY docker-entrypoint.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/docker-entrypoint.sh

# Create a non-root user for security
RUN useradd -r -u 1001 -g root speedcam && \
    chown -R speedcam:root /app && \
    chmod -R g+rwX /app

# Switch to non-root user
USER speedcam

# Set environment variables
ENV JAVA_OPTS=""

# Default entrypoint uses our custom script
ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

# Default command - process sample videos
CMD ["--in", "src/main/resources/sample_videos/"]