For some reason tini couldnt be found no matter what effort I do to get it, I tried changing versions, changing filepaths, also used variables, also tried appending – with their platform for example amd64:

FROM --platform=linux/amd64 ubuntu:22.04 AS base

ENV project=meeting-sdk-linux-sample
ENV cwd=/tmp/$project

# Install Dependencies
RUN apt-get update 
    && apt-get install -y 
    build-essential 
    ca-certificates 
    cmake 
    curl 
    gdb 
    git 
    libdbus-1-3 
    libgbm1 
    libgl1-mesa-glx 
    libglib2.0-0 
    libglib2.0-dev 
    libssl-dev 
    libx11-xcb1 
    libxcb-image0 
    libxcb-keysyms1 
    libxcb-randr0 
    libxcb-shape0 
    libxcb-shm0 
    libxcb-xfixes0 
    libxcb-xtest0 
    libxfixes3 
    pkgconf 
    tar 
    unzip 
    zip 
    libasound2 libasound2-plugins alsa alsa-utils alsa-oss 
    pulseaudio pulseaudio-utils

# Install Tini
ENV TINI_VERSION v0.19.0
ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
RUN chmod +x /tini

FROM base AS deps

WORKDIR /opt
RUN git clone --depth 1 https://github.com/Microsoft/vcpkg.git 
    && ./vcpkg/bootstrap-vcpkg.sh -disableMetrics 
    && ln -s /opt/vcpkg/vcpkg /usr/local/bin/vcpkg 
    && vcpkg install vcpkg-cmake

FROM deps AS build

WORKDIR $cwd
RUN echo $cwd

# Copy the entry.sh script and other necessary files into the container
COPY entry.sh $cwd/entry.sh
RUN chmod +x $cwd/entry.sh

# Copy the entire source code for the meetingsdk-headless
COPY . .

# Debugging: Verify the presence and permissions of entry.sh
RUN ls -l entry.sh

# Ensure entry.sh is executable and set as entrypoint
ENTRYPOINT ["/tini", "--", $cwd + "/entry.sh"]

Really need help on this, for some reason tini wont just get found. File structure looks like this, its a docker inside a docker, I have a dockerized python api that when /receive is triggered it triggers the meetingssdk:

Note that I already tried solutions on other S/O posts similar to this but none worked for me. So please do not tag this as duplicate, I think the key is sequencing the dockerfile. Im trying that out now but stuck on this really.

One S/O post just added -amd64 that didnt work for me.

Note that when I run this independently everything works good so far. It doesnt work now its docker in docker

UPDATE:

Thanks for correcting how I appending cwd with the string so I tried that out
Below is the error message, it seems now entry.sh is not being detected intead.

mypopzoombot-flask_app-1  | #14 [zoomsdk deps 2/2] RUN git clone --depth 1 https://github.com/Microsoft/vcpkg.git     && ./vcpkg/bootstrap-vcpkg.sh -disableMetrics     && ln -s /opt/vcpkg/vcpkg /usr/local/bin/vcpkg     && vcpkg install vcpkg-cmake
mypopzoombot-flask_app-1  | #14 CACHED
mypopzoombot-flask_app-1  | 
mypopzoombot-flask_app-1  | #15 [zoomsdk build 4/7] RUN chmod +x entry.sh
mypopzoombot-flask_app-1  | #15 CACHED
mypopzoombot-flask_app-1  | 
mypopzoombot-flask_app-1  | #16 [zoomsdk build 5/7] COPY . .
mypopzoombot-flask_app-1  | #16 DONE 1.1s
mypopzoombot-flask_app-1  | 
mypopzoombot-flask_app-1  | #17 [zoomsdk build 6/7] RUN ls -l /tini
mypopzoombot-flask_app-1  | #17 0.488 -rwx--x--x 1 root root 24064 Dec  7  2021 /tini
mypopzoombot-flask_app-1  | #17 DONE 0.5s
mypopzoombot-flask_app-1  | 
mypopzoombot-flask_app-1  | #18 [zoomsdk build 7/7] RUN ls -l /entry.sh
mypopzoombot-flask_app-1  | #18 0.528 ls: cannot access '/entry.sh': No such file or directory
mypopzoombot-flask_app-1  | #18 ERROR: process "/bin/sh -c ls -l /entry.sh" did not complete successfully: exit code: 2
mypopzoombot-flask_app-1  | ------
mypopzoombot-flask_app-1  |  > [zoomsdk build 7/7] RUN ls -l /entry.sh:
mypopzoombot-flask_app-1  | 0.528 ls: cannot access '/entry.sh': No such file or directory
mypopzoombot-flask_app-1  | ------
mypopzoombot-flask_app-1  | failed to solve: process "/bin/sh -c ls -l /entry.sh" did not complete successfully: exit code: 2