Dockerfile

# Use a JDK 20 base image for building
FROM openjdk:20-slim as builder

# Install Maven
RUN apt-get update && \
    apt-get install -y maven

# Set the working directory in the container
WORKDIR /app

# Copy the pom.xml file into the container
COPY pom.xml .

# Download project dependencies
# This is done separately from copying source code to utilize Docker's caching mechanism
RUN mvn dependency:go-offline

# Copy the rest of the source code into the container
COPY src/ src/

# Build the application
RUN mvn clean install -DskipTests

# Use the JDK 20 base image for runtime
FROM openjdk:20-slim

# Set the working directory in the runtime image
WORKDIR /app

# Copy the built jar file from the builder stage into the current stage
COPY --from=builder /app/target/flightdash-0.0.1-SNAPSHOT.jar /app/flightdash-0.0.1-SNAPSHOT.jar

# Command to run the application
CMD ["java", "-jar", "/app/flightdash-0.0.1-SNAPSHOT.jar"]