Dockerfile for filament webgl build

Dockerfile

# Start from a Ubuntu image with the latest version of Ubuntu
FROM ubuntu:latest

# Update and upgrade Ubuntu packages
RUN apt-get update && apt-get upgrade -y

# Install necessary packages (libglu1-mesa-dev vs  libgl-dev)
RUN apt-get install -y git python3 cmake build-essential clang llvm libc++-dev libc++abi-dev libgl-dev

# Set Clang as default C and C++ compiler
RUN update-alternatives --install /usr/bin/cc cc /usr/bin/clang 100
RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++ 100

# Clone and build Emscripten
WORKDIR /
RUN git clone https://github.com/emscripten-core/emsdk.git
WORKDIR /emsdk
RUN ./emsdk install latest
RUN ./emsdk activate latest

# Set up Emscripten environment variables
ENV EMSDK=/emsdk
ENV EM_CONFIG=/emsdk/.emscripten
ENV EM_CACHE=/emsdk/cache
ENV EM_PORTS=/emsdk/ports

# Add emscripten to PATH
ENV PATH="/emsdk:${PATH}"
ENV PATH="/emsdk/upstream/emscripten:${PATH}"
ENV PATH="/emsdk/node/15.14.0_64bit/bin:${PATH}"

# Copy Filament into the Docker container
COPY ./filament /filament

# Build Filament
WORKDIR /filament
RUN ./build.sh -p webgl release

git clone filament into subdirectory below Dockerfile
docker build -t filament .
docker run --rm -it filament bash