Unable to add small files with drag and drop

[MaximeWeyl]

Using matlab-proxy in my browser, i am not able to drag and drop a 3.4 Mb file.

Here is my Dockerfile :

ARG FROM="ubuntu:20.04"

FROM $FROM as ubuntu_myuser
SHELL ["/bin/bash", "-l", "-c"]
ENV LANG=C.UTF-8
ENV SHELL=/bin/bash

ENV WORKSPACE_DIR=/workspace
ENV REAL_WORKSPACE_DIR=/.workspace

# Creation of myuser
USER root
RUN mkdir -p $WORKSPACE_DIR && \
    chown 42420:42420 $WORKSPACE_DIR && \
    addgroup --gid 42420 myuser && \
    useradd --uid 42420 -g myuser --shell /bin/bash -d $WORKSPACE_DIR myuser

USER myuser
WORKDIR /workspace

# ----- Step matlab
# ========================================== Dependencies =========================================================
# based on the work from : https://github.com/mathworks-ref-arch/container-images/blob/main/matlab-deps/r2022a/ubuntu20.04/Dockerfile
FROM ubuntu_myuser as matlab_deps
USER root
ENV DEBIAN_FRONTEND="noninteractive" TZ="Etc/UTC"
RUN apt-get update && apt-get install --no-install-recommends -y ca-certificates libasound2 libc6 libcairo-gobject2 \
    libcairo2 libcap2 libcrypt1 libcrypt-dev libcups2 libdbus-1-3 libdrm2 libfontconfig1 libgbm1 libgdk-pixbuf2.0-0 \
    libgl1 libglib2.0-0 libgomp1 libgstreamer-plugins-base1.0-0 libgstreamer1.0-0 libgtk-3-0 libnspr4 libnss3  \
    libodbc1 libpam0g libpango-1.0-0 libpangocairo-1.0-0 libpangoft2-1.0-0 libpython3.9 libsm6 libsndfile1 libuuid1 \
    libx11-6 libx11-xcb1 libxcb-dri3-0 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxft2 libxi6 \
    libxinerama1 libxrandr2 libxrender1 libxt6 libxtst6 libxxf86vm1 linux-libc-dev locales locales-all make net-tools \
    procps sudo unzip wget zlib1g \
    && apt-get clean && apt-get -y autoremove && rm -rf /var/lib/apt/lists/*
RUN [ -d /usr/share/X11/xkb ] || mkdir -p /usr/share/X11/xkb
# Install patched glibc - See https://github.com/mathworks/build-glibc-bz-19329-patch
# Note: base-dependencies.txt includes libcrypt-dev and linux-libc-dev to enable installation of patched -dev packages
WORKDIR /packages
RUN export DEBIAN_FRONTEND=noninteractive &&\
    wget -q https://github.com/mathworks/build-glibc-bz-19329-patch/releases/download/ubuntu-focal/all-packages.tar.gz &&\
    tar -x -f all-packages.tar.gz \
        --exclude glibc-*.deb \
        --exclude libc6-dbg*.deb &&\
    apt-get install --yes --no-install-recommends ./*.deb &&\
    rm -fr /packages
WORKDIR /

# ========================================== Matlab installation =========================================================
# Source : https://github.com/mathworks-ref-arch/matlab-dockerfile/blob/main/Dockerfile

FROM matlab_deps as matlab_matlab
ARG matlab_MATLAB_RELEASE=r2022a

# Install mpm dependencies
RUN export DEBIAN_FRONTEND=noninteractive && apt-get update && \
    apt-get install --no-install-recommends --yes \
        wget \
        unzip \
        ca-certificates && \
    apt-get clean && apt-get autoremove

RUN wget -q https://www.mathworks.com/mpm/glnxa64/mpm && \
    chmod +x mpm && \
    ./mpm install \
        --release=${matlab_MATLAB_RELEASE} \
        --destination=/opt/matlab \
        --products MATLAB || \
    (echo "MPM Installation Failure. See below for more information:" && cat /tmp/mathworks_root.log && false) && \
    rm -f mpm /tmp/mathworks_root.log && \
    ln -s /opt/matlab/bin/matlab /usr/local/bin/matlab

USER myuser
WORKDIR /workspace

# ========================================== Matlab proxy installation =========================================================
# Adds matlab proxy : https://github.com/mathworks/matlab-proxy/blob/main/examples/Dockerfile
FROM matlab_matlab as matlab_matlab-with-proxy
USER root
# Install dependencies for matlab-proxy
RUN DEBIAN_FRONTEND=noninteractive && \
    apt-get update && apt-get install --no-install-recommends -y \
    && apt-get install --no-install-recommends -y \
    python3 \
    python3-pip \
    xvfb \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*
RUN python3 -m pip install matlab-proxy

# Set environment variables used by integration
ENV MWI_APP_HOST="0.0.0.0"
ENV MWI_APP_PORT="8080"
ENV MWI_BASE_URL="/"

ENTRYPOINT []
CMD ["matlab-proxy-app"]

And here it is built and pushed to dockerhub : ovhaimax/matlab:sizeissue

I do not get this error on https://matlab.mathworks.com/, but I do here with my own Dockerfile of matlab proxy.