Update Dockerfile

Author: jakubno

template/Dockerfile

@@ -1,8 +1,5 @@
 FROM python:3.10.14
 
-ENV JAVA_HOME=/opt/java/openjdk
-ENV PATH="${JAVA_HOME}/bin:${PATH}"
-
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y --no-install-recommends \
   build-essential curl git util-linux jq sudo nodejs npm fonts-noto-cjk
 
@@ -11,15 +8,19 @@ ENV PIP_DEFAULT_TIMEOUT=100 \
   PIP_NO_CACHE_DIR=1 \
   JUPYTER_CONFIG_PATH="/root/.jupyter" \
   IPYTHON_CONFIG_PATH="/root/.ipython" \
-  SERVER_PATH="/root/.server"
+  SERVER_PATH="/root/.server" \
+  R_VERSION=4.4.2
+
+ENV R_HOME=/opt/R/${R_VERSION} \
+    JAVA_HOME=/opt/java/openjdk
 
 # Install Jupyter
 COPY ./requirements.txt requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt && ipython kernel install --name "python3" --user
 
 # R Kernel
-RUN apt-get update && apt-get install -y r-base
-RUN R -e "install.packages('IRkernel')"
+RUN curl -O https://cdn.rstudio.com/r/debian-12/pkgs/r-${R_VERSION}_1_amd64.deb && sudo apt-get update && sudo apt-get install -y ./r-${R_VERSION}_1_amd64.deb && ln -s ${R_HOME}/bin/R /usr/bin/R
+RUN R -e "install.packages('IRkernel', repos='https://cloud.r-project.org')"
 RUN R -e "IRkernel::installspec(user = FALSE, name = 'r', displayname = 'R')"
 
 # Javascript Kernel
@@ -63,6 +64,8 @@ COPY startup_scripts/* $IPYTHON_CONFIG_PATH/profile_default/startup
 
 
 COPY --from=eclipse-temurin:11-jdk $JAVA_HOME $JAVA_HOME
+RUN ln -s ${JAVA_HOME}/bin/java /usr/bin/java
+
 # Java Kernel
 RUN wget https://github.com/SpencerPark/IJava/releases/download/v1.3.0/ijava-1.3.0.zip && \
     unzip ijava-1.3.0.zip && \