Use a stable Alpine version instead of edge to avoid untrusted signtures

[tormi]

Problem

Recently I've been getting the following error messages when trying to use dehy/adminer:

fetch https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
ERROR: https://dl-cdn.alpinelinux.org/alpine/edge/main: UNTRUSTED signature
fetch https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz
ERROR: https://dl-cdn.alpinelinux.org/alpine/edge/community: UNTRUSTED signature
v20210212-7302-g4df6acb4f5 [https://dl-cdn.alpinelinux.org/alpine/edge/main]
v20210212-7296-g7c150a48ef [https://dl-cdn.alpinelinux.org/alpine/edge/community]
2 errors; 14869 distinct packages available

Let's use a stable Alpine version instead of edge to avoid untrusted signtures. alpine:3.16 is the last version matching with the current rootfs/build.sh packages:

• https://git.alpinelinux.org/aports/tree/community/php8?h=3.16-stable - OK
• https://git.alpinelinux.org/aports/tree/community/php8?h=3.17-stable - Path not found

[tormi]

Another way would be to upgrade packages in rootfs/build.sh & elsewhere to PHP 8.2 or above and use FROM alpine:latest in Dockerfile.

[tormi]

Looks like Adminer is deprecated and this is the fork: https://github.com/adminerevo/adminerevo. It doesn't have any Docker image yet: adminerevo/adminerevo#22.