WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature

[gunda-sec]

WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: BAD signature
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz: BAD signature
ERROR: unsatisfiable constraints:
openssl (missing):
required by: world[openssl]
ERROR: Service 'nginx' failed to build : The command '/bin/sh -c apk add --no-cache openssl && chmod -R g=u /var/cache/nginx && mkdir /var/run/defectdojo && chmod -R g=u /var/run/defectdojo && mkdir -p /etc/nginx/ssl && chmod -R g=u /etc/nginx && true' returned a non-zero code: 1

I have restarted the docker but still the error repeats

[ncopa]

I cannot reproduce.

ncopa-desktop:~$ docker run --rm -it alpine:3.12
/ # apk add --no-cache openssl
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
(1/1) Installing openssl (1.1.1g-r0)
Executing busybox-1.31.1-r16.trigger
OK: 6 MiB in 15 packages

I think it might be due to something on your network.
can you please try use https instead?

sed -i -e 's/http:/https:/' /etc/apk/repositories