feat: update gitpod dockerfile

.gitpod.Dockerfile

@@ -1,15 +1,12 @@
-FROM gitpod/workspace-full
+FROM gitpod/workspace-full:latest
 
 USER gitpod
 
-# https://openwrt.org/docs/guide-developer/build-system/install-buildsystem#debianubuntu
+# https://openwrt.org/docs/guide-developer/toolchain/install-buildsystem#debianubuntumint
 RUN sudo apt-get -q update && \
-	 sudo apt-get install -yq \
-		build-essential ccache ecj fastjar file g++ gawk \
-		gettext git java-propose-classpath libelf-dev libncurses5-dev \
-		libncursesw5-dev libssl-dev python python2.7-dev python3 unzip wget \
-		python3-distutils python3-setuptools rsync subversion swig time \
-		xsltproc zlib1g-dev && \
+		sudo apt install build-essential clang flex bison g++ gawk \
+			gcc-multilib g++-multilib gettext git libncurses-dev libssl-dev \
+			python3-distutils rsync unzip zlib1g-dev file wget zstd && \
 	 sudo rm -rf /var/lib/apt/lists/*
 
 RUN sudo update-ccache-symlinks