Update docker linux with emscripten (#697)

* Update docker linux-emscripten-amd64

Install necessary libs + update emcc 3.1.35

* Update Dockerfile

skiko/docker/linux-emscripten-amd64/Dockerfile

@@ -6,8 +6,11 @@ RUN apt-get update -y && \
     apt-get install git curl wget -y && \
     apt-get install python -y && \
     apt-get install openjdk-11-jdk -y
+# Install libs & tools
+RUN apt-get install git python wget -y && \
+    apt-get install fontconfig libfontconfig1-dev libglu1-mesa-dev libxrandr-dev libdbus-1-dev curl zip -y
 ENV EMSDK_DIR=/usr/emsdk
-ENV EMSDK_VER=2.0.29
+ENV EMSDK_VER=3.1.35
 RUN git clone https://github.com/emscripten-core/emsdk.git $EMSDK_DIR && \
     $EMSDK_DIR/emsdk install $EMSDK_VER && \
     $EMSDK_DIR/emsdk activate $EMSDK_VER