devcontainer server from scratch

.devcontainer/server/Dockerfile

@@ -1,16 +1,30 @@
-FROM mcr.microsoft.com/openjdk/jdk:21-ubuntu
+ARG VARIANT=21-jdk
+FROM eclipse-temurin:${VARIANT}
 
-# Set build arguments for username, UID, and GID
+RUN apt-get update \
-ARG USERNAME=java
+    && apt-get -y install --no-install-recommends \
-ARG USER_UID=1000
+    ca-certificates \
-ARG USER_GID=1000
+    git \
+    nano \
+    vim-tiny \
+    && apt-get auto-remove -y \
+    && apt-get clean -y \
+    && chsh -s $(which bash) ubuntu \
+    && echo 'export PS1="\e[01;32m\u\e[m:\e[01;34m\w\e[m\$ "' >> /home/ubuntu/.bashrc
 
-# Create the user and group with the specified UID and GID
+ENV MAVEN_HOME=/opt/maven
-RUN groupadd --gid $USER_GID $USERNAME \
+ENV PATH=$MAVEN_HOME/bin:$PATH
-    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
+
+ARG MAVEN_VERSION=3.9.10
+ARG BASE_URL=https://dlcdn.apache.org/maven/maven-3/${MAVEN_VERSION}/binaries
+
+RUN mkdir -p $MAVEN_HOME \
+ && curl -fsSL -o /tmp/apache-maven.tar.gz ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
+ && tar -xzf /tmp/apache-maven.tar.gz -C $MAVEN_HOME --strip-components=1 \
+ && rm -f /tmp/apache-maven.tar.gz
 
 # Set the default user
-USER $USERNAME
+USER ubuntu
 
 # Set the working directory
-WORKDIR /home/$USERNAME
+WORKDIR /home/ubuntu

.devcontainer/server/devcontainer.json

@@ -3,12 +3,6 @@
   "build": {
     "dockerfile": "Dockerfile",
   },
-  "features": {
-    "ghcr.io/devcontainers/features/java:1": {
-      "installMaven": "true"
-    },
-    "ghcr.io/devcontainers/features/git:1": {}
-  },
   "containerEnv": {
     "GIT_REPO_URL": "https://scm.vilanet.fr/kriss/slot"
   },