Adds mvn to production container (#387)

This also required switching from a JRE base image to a JDK base image.

Dockerfile

@@ -45,11 +45,29 @@ RUN ./gradlew installDist
 
 ### Runtime container
 # Use Java JRE as the base image -- the `freshli` executable is self contained (meaning it does not need the .NET runtime to be installed)
-FROM eclipse-temurin:17-jre-jammy AS final
+FROM eclipse-temurin:17-jdk-jammy AS final
 
 # Install git
 RUN apt update -y && apt install git -y
 
+# Install maven
+# Copied from https://github.com/carlossg/docker-maven/blob/d2333e08a71fe120a0ac245157906e9b3507cee3/eclipse-temurin-17/Dockerfile
+ARG MAVEN_VERSION=3.8.6
+ARG USER_HOME_DIR="/root"
+ARG SHA=f790857f3b1f90ae8d16281f902c689e4f136ebe584aba45e4b1fa66c80cba826d3e0e52fdd04ed44b4c66f6d3fe3584a057c26dfcac544a60b301e6d0f91c26
+ARG BASE_URL=https://apache.osuosl.org/maven/maven-3/${MAVEN_VERSION}/binaries
+
+RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
+    && curl -fsSL -o /tmp/apache-maven.tar.gz ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
+    && echo "${SHA}  /tmp/apache-maven.tar.gz" | sha512sum -c - \
+    && tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 \
+    && rm -f /tmp/apache-maven.tar.gz \
+    && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
+
+ENV MAVEN_HOME /usr/share/maven
+ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
+RUN mkdir -p $MAVEN_CONFIG
+
 # Copy `freshli` executable from the `dotnet_build` image
 RUN mkdir -p /usr/local/share/freshli
 COPY --from=dotnet_build /app/freshli/exe/ /usr/local/share/freshli/