cleaning in env, adding some webtop vars

.env.sample

 #COMPOSE_FILE=docker-compose.yml:traefik.yml
 COMPOSE_FILE=docker-compose.yml:ports.yml
 
-
-PASS=MON_SUPER_MOT_DE_PASSE
 NAME=kasmVNC
 VNC_USER=kasm
 HOST=kasmVNC.tetras-lab.io
@@ -10,23 +8,27 @@ PORT=3001
 UID=1000
 GID=1000
 
-# === install module === #
-#
-# Put variable at true to install
-# Put variable at false to do not install
-#
+# ===  Webtop specific variables === #
+# https://docs.linuxserver.io/images/docker-webtop/#options-in-all-kasmvnc-based-gui-containers
 # ====================== #
 
+CUSTOM_USER=kasmuser
+PASSWORD=MON_SUPER_MOT_DE_PASSE
+TITLE=Webtop
 LC_ALL=fr_FR-UTF-8
 TZ=Europe/Paris
+
+# === install/config module === #
+# Set variable to true to install or enable,
+# false otherwise.
+# ====================== #
+
 # Install anaconda (distribution platform for Python and R)
 ANACONDA=true
 # Install QGIS
 QGIS=true
 # Install JAVA tell which jdk ie default-jdk openjdk-8 etc.
 JAVA=
-# Install gfortran set only number ex 10
-GFORTRAN=
 # Should the user have sudo rights
 # **only home is a volume, any modifcation in other FS will be lost**
 SUDO=false

docker-compose.yml

@@ -7,23 +7,22 @@ services:
         - QGIS=${QGIS}
         - ANACONDA=${ANACONDA}
         - JAVA=${JAVA}
-        - GFORTRAN=${GFORTRAN}
-    image: "webtop-ubuntu-mate:anaconda-${ANACONDA}_QGIS-${QGIS}_JAVA-${JAVA}_GFORTRAN-${GFORTRAN}_SUDO-${SUDO}"
+    image: "webtop-ubuntu-mate:anaconda-${ANACONDA}_QGIS-${QGIS}_JAVA-${JAVA}_SUDO-${SUDO}"
     shm_size: '1gb'
     security_opt:
       - seccomp:unconfined #optional
     volumes:
       - homedir:/config:rw
     environment:
-      - PASSWORD=${PASS}
       - ANACONDA=${ANACONDA}
-      - CUSTOM_USER=${VNC_USER}
-      - PUID=${UID}
-      - PGID=${GID}
-      - TZ=${TZ}
+      #- PUID=${UID}
+      #- PGID=${GID}
       - SUDO=${SUDO}
-    devices:
-      - /dev/dri:/dev/dri #optional
+      - CUSTOM_USER=${CUSTOM_USER}
+      - PASSWORD=${PASSWORD}
+      - TITLE=${TITLE}
+      - LC_ALL=fr_FR-UTF-8
+      - TZ=${TZ}
 
 volumes:
   homedir: