Docker compose failing

[mightywomble]

Problem with the apt repo supplied

[+] Running 1/1
 ! speedflux Warning pull access denied for speedflux, repository does not exist or may require 'docker login': denied: requested access to the resource is denied                           1.2s 
[+] Building 2.8s (10/18)                                                                                                                                                          docker:default
 => [speedflux internal] load build definition from Dockerfile                                                                                                                               0.0s
 => => transferring dockerfile: 873B                                                                                                                                                         0.0s
 => [speedflux internal] load metadata for docker.io/library/python:3.8-slim-buster                                                                                                          0.4s
 => [speedflux internal] load .dockerignore                                                                                                                                                  0.0s
 => => transferring context: 71B                                                                                                                                                             0.0s
 => [speedflux  1/14] FROM docker.io/library/python:3.8-slim-buster@sha256:8799b0564103a9f36cfb8a8e1c562e11a9a6f2e3bb214e2adc23982b36a04511                                                  0.0s
 => [speedflux internal] load build context                                                                                                                                                  0.0s
 => => transferring context: 656B                                                                                                                                                            0.0s
 => CACHED [speedflux  2/14] RUN apt-get update                                                                                                                                              0.0s
 => CACHED [speedflux  3/14] RUN apt-get -q -y install --no-install-recommends apt-utils gnupg1 apt-transport-https dirmngr curl                                                             0.0s
 => CACHED [speedflux  4/14] RUN curl -s https://install.speedtest.net/app/cli/install.deb.sh --output /opt/install.deb.sh                                                                   0.0s
 => CACHED [speedflux  5/14] RUN bash /opt/install.deb.sh                                                                                                                                    0.0s
 => ERROR [speedflux  6/14] RUN apt-get update && apt-get -q -y install speedtest                                                                                                            2.3s
------                                                                                                                                                                                            
 > [speedflux  6/14] RUN apt-get update && apt-get -q -y install speedtest:                                                                                                                       
0.298 Hit:1 http://deb.debian.org/debian buster InRelease                                                                                                                                         
0.298 Hit:2 http://deb.debian.org/debian-security buster/updates InRelease                                                                                                                        
0.303 Hit:3 http://deb.debian.org/debian buster-updates InRelease                                                                                                                                 
1.577 Get:4 https://packagecloud.io/ookla/speedtest-cli/debian buster InRelease [24.5 kB]                                                                                                         
1.628 Err:4 https://packagecloud.io/ookla/speedtest-cli/debian buster InRelease
1.628   The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E61C2AB9A6D1557
1.632 Reading package lists...
2.218 W: GPG error: https://packagecloud.io/ookla/speedtest-cli/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E61C2AB9A6D1557
2.218 E: The repository 'https://packagecloud.io/ookla/speedtest-cli/debian buster InRelease' is not signed.
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