Dockerfile

# ====== Stage 1: Build the application ======
# maven:3.9.9-eclipse-temurin-25 does not exist yet; install Maven over the official JDK 25 image instead
FROM eclipse-temurin:25-jdk-jammy AS build

# Install Maven 3.9.9 manually
ARG MAVEN_VERSION=3.9.9
RUN apt-get update && apt-get install -y wget && \
    wget -q https://archive.apache.org/dist/maven/maven-3/${MAVEN_VERSION}/binaries/apache-maven-${MAVEN_VERSION}-bin.tar.gz -P /tmp && \
    tar -xzf /tmp/apache-maven-${MAVEN_VERSION}-bin.tar.gz -C /opt && \
    ln -s /opt/apache-maven-${MAVEN_VERSION} /opt/maven && \
    rm /tmp/apache-maven-${MAVEN_VERSION}-bin.tar.gz && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

ENV MAVEN_HOME=/opt/maven
ENV PATH="${MAVEN_HOME}/bin:${PATH}"

# Set working directory
WORKDIR /app

# Copy pom.xml and download dependencies first (to leverage Docker cache)
COPY pom.xml .
RUN mvn dependency:go-offline

# Copy source code
COPY src ./src

# Package the application
RUN mvn clean package -DskipTests

# ====== Stage 2: Run the application ======
FROM eclipse-temurin:25-jdk-jammy

# Create user with ID 1000 as required by Hugging Face
RUN useradd -m -u 1000 user

# Switch to the user
USER user

# Set home directory and update PATH for the user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Set working directory to user's home
WORKDIR $HOME/app

# Copy jar from build stage with proper ownership
COPY --from=build --chown=user /app/target/chatbot-bridge-service-0.0.1-SNAPSHOT.jar app.jar

# Expose port 7860 (Hugging Face default)
EXPOSE 7860

# Run the application on port 7860
ENTRYPOINT ["java", "-jar", "app.jar", "--server.port=7860"]