Update .gitpod.dockerfile

.gitpod.dockerfile

@@ -1,12 +1,5 @@
 FROM gitpod/workspace-full:latest
 
-ENV ANDROID_HOME=/workspace/android-sdk \
+ENV ANDROID_HOME=/sdk/android-sdk \
-    FLUTTER_ROOT=/workspace/flutter \
+    FLUTTER_ROOT=/sdk/flutter \
-    FLUTTER_HOME=/workspace/flutter
+    FLUTTER_HOME=/sdk/flutter
-
-USER root
-
-RUN apt-get update && \
-    apt-get -y install build-essential libkrb5-dev gcc make gradle openjdk-8-jdk && \
-    apt-get clean && \
-    apt-get -y autoremove