Update kde/Dockerfile

kde/Dockerfile

@@ -1,21 +1,26 @@
 # syntax = docker/dockerfile:1
-FROM myvnc/base
+FROM myvnc/webtop:alpinekde
 USER root
 
 # Build ARG: use "root" for debugging
 ARG debug
 
 # X session environment variable
-ENV STARTXBIN=i3
+ENV STARTXBIN=startplasma-x11
 
 # Run
 RUN apk add --no-cache \
     tigervnc \
-    i3wm \
-    font-dejavu
+    plasma-desktop-meta \
+    firefox font-dejavu
 
 # Tigervnc initialization scripts
 COPY *.sh /app/init.d/
 
-# Reset user
-USER ${debug:-user}
+# Default env
+USER ${debug:-user}
+WORKDIR /home/user
+ENV HOME=/home/user
+ENV DISPLAY=:0
+ENV SHELL=/usr/bin/bash
+ENV PS1="[\u@\h \W \$?]\$ "