add condition to install spyder and anaconda if variable is define at true in .env

.env.sample

 #COMPOSE_FILE=docker-compose.yml:traefik.yml
 COMPOSE_FILE=docker-compose.yml:ports.yml
-PASS=MON_SUPER_MOT_DE_PASSE
 
+
+PASS=MON_SUPER_MOT_DE_PASSE
 NAME=kasmVNC
 HOST=kasmVNC.tetras-lab.io
+
+# === install module === #
+#
+# Put variable at true to install
+# Put variable at false to do not install
+#
+# ====================== #
+
+# Install Spyder (python IDE)
+SPYDER=true
+# Install anaconda (distribution platform for Python and R)
+ANACONDA=true

Dockerfile

 FROM kasmweb/core-ubuntu-noble:1.16.0 as kasmvnc-base
 
+ARG SPYDER
+ARG ANACONDA
+
 USER root
 
 RUN apt-get update
 RUN mkdir /install
 
-# === Install anaconda === #
-FROM kasmvnc-base as kasmvnc-anaconda
-
 WORKDIR /install
-
-RUN wget https://repo.anaconda.com/archive/Anaconda3-2024.02-1-Linux-x86_64.sh
-
-RUN bash Anaconda3-2024.02-1-Linux-x86_64.sh -b
-
-RUN chmod u+x /home/kasm-user/anaconda3/etc/profile.d/conda.sh
-
-RUN echo "source ~/anaconda3/etc/profile.d/conda.sh" >> /home/kasm-default-profile/.bashrc
-RUN echo "conda activate" >> /home/kasm-default-profile/.bashrc
-
-USER 1000
-
 # === Install Spyder === #
-FROM kasmvnc-base as kasmvnc-spyder
 
-RUN apt-get install -y python3-spyder
-USER 1000
-
-# === Install mathlab === #
-FROM kasmvnc-base as kasmvnc-mathlab
+RUN if [ "$SPYDER" = true ] ; then apt-get install -y python3-spyder; fi
 
-RUN apt-get install -y python3-spyder
+# === Install anaconda === #
+RUN if [ "$ANACONDA" = true ] ; then \
+    wget https://repo.anaconda.com/archive/Anaconda3-2024.02-1-Linux-x86_64.sh; \
+    bash Anaconda3-2024.02-1-Linux-x86_64.sh -b; \
+    chmod u+x /home/kasm-user/anaconda3/etc/profile.d/conda.sh; \
+    echo "source ~/anaconda3/etc/profile.d/conda.sh" >> /home/kasm-default-profile/.bashrc; \
+    echo "conda activate" >> /home/kasm-default-profile/.bashrc; \
+    fi
+
+WORKDIR /home/kasm-user
 USER 1000

docker-compose.yml

@@ -4,12 +4,15 @@ services:
     build:
       context: ./
       target: kasmvnc-base
-
+      args:
+        - SPYDER=${SPYDER}
+        - ANACONDA=${ANACONDA}
     container_name: KasmVNC-ubuntu
     volumes:
       - ./homedir:/home/kasm_user:rw
     environment:
       - VNC_PW=${PASS}
 
+
 volumes:
   homedir: