build: redo Dockerfile for alternative build process

Author: jknack

Dockerfile

@@ -2,41 +2,21 @@
 
 # Usage:
 # - docker build -t jooby .
-# - docker run -it jooby
+# - docker run -it jooby -v "$HOME/.m2":/root/.m2
 # - /build # mvn clean package
 
-FROM ubuntu:latest
-
-RUN apt-get update && \
-    apt-get install -y openjdk-17-jdk && \
-    apt-get clean;
-
-RUN apt-get install -y wget
-
-RUN wget --no-verbose -O /tmp/apache-maven-3.9.1.tar.gz https://dlcdn.apache.org/maven/maven-3/3.9.1/binaries/apache-maven-3.9.1-bin.tar.gz
-
-# install maven
-RUN tar xzf /tmp/apache-maven-3.9.1.tar.gz -C /opt/
-RUN ln -s /opt/apache-maven-3.9.1 /opt/maven
-RUN ln -s /opt/maven/bin/mvn /usr/local/bin
-RUN rm -f /tmp/apache-maven-3.9.1.tar.gz
-ENV MAVEN_HOME /opt/maven
-
-# Random port for testing
-
-ENV BUILT_PORT 0
-ENV BUILT_SECURE_PORT 0
+FROM maven:3-eclipse-temurin-17 as build
 
 WORKDIR /build
 
 COPY pom.xml .
 COPY docs/ /build/docs/
 COPY etc/ /build/etc/
-COPY jooby/ /build/jooby
+COPY jooby/ /build/jooby/
 COPY modules/ /build/modules/
 COPY tests/ /build/tests/
 
-# Install
-RUN mvn clean install --fail-never -q
+ENV BUILT_PORT 0
+ENV BUILT_SECURE_PORT 0
 
 CMD ["/bin/bash"]