How to run server on armv7 with docker

Good morning sir,

I am not completely sure I understand what you write here:

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"You can cross-compile for RPi, it is much faster. We are doing it here:
https://github.com/alphacep/vosk-api/blob/master/travis/Dockerfile.dockcross

As for docker, it doesn't work on ARM. Instead, you can install vosk with pip and clone and run the server."
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Do you mean that it runs on armv7 and on? I tried with the dockerfile you mention in the link in raspberry pi 4B 4GB and docker version 20.10.5 and I get this error...

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Step 1/7 : ARG DOCKCROSS_IMAGE=alphacep/dockcross-linux-armv7
Step 2/7 : FROM ${DOCKCROSS_IMAGE}
latest: Pulling from alphacep/dockcross-linux-armv7
27833a3ba0a5: Pull complete
5c48f1db2628: Pull complete
80a0794c56a5: Pull complete
9fb82c195262: Pull complete
41a971ead397: Pull complete
bb041d55ef72: Pull complete
d4094beb3fa2: Pull complete
8f82338edd79: Pull complete
337783ef0c20: Pull complete
04a3ad3d55d7: Pull complete
c634e9e1d660: Pull complete
59b2b730dd40: Pull complete
9cd6cd1e3b31: Pull complete
ee26a6b1a9b9: Pull complete
7f8f0c530d93: Pull complete
025b9af3775e: Pull complete
Digest: sha256:19df925d5be45d8bfd2b3f8a2cb3637642f21fa626cc5ba93b5a663455530729
Status: Downloaded newer image for alphacep/dockcross-linux-armv7:latest
---> f5fc3bba6b6c
Step 3/7 : LABEL description="A docker image for building portable Python linux binary wheels and Kaldi on other architectures"
---> [Warning] The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm/v7) and no specific platform was requested
---> Running in eedbd274ba9f
Removing intermediate container eedbd274ba9f
---> 7e7ea65c497c
Step 4/7 : LABEL maintainer="contact@alphacephei.com"
---> [Warning] The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm/v7) and no specific platform was requested
---> Running in 5aea50dfd28e
Removing intermediate container 5aea50dfd28e
---> 0e7a4a2765c6
Step 5/7 : RUN apt-get update && apt-get install -y --no-install-recommends wget libffi-dev libpcre3-dev zlib1g-dev automake autoconf libtool cmake python3 python3-pip python3-wheel python3-setuptools python3-cffi && rm -rf /var/lib/apt/lists/*
---> [Warning] The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm/v7) and no specific platform was requested
---> Running in ea60932ba6f3
standard_init_linux.go:219: exec user process caused: exec format error
The command '/bin/sh -c apt-get update && apt-get install -y --no-install-recommends wget libffi-dev libpcre3-dev zlib1g-dev automake autoconf libtool cmake python3 python3-pip python3-wheel python3-setuptools python3-cffi && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 1

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What is wrong ?