Update to Alpine 3.11 on 2.7 python images with same tag

[biopsihoz]

Hello, when you upgrade version of alpine, main repository changes:

before

apk update -q && apk add --no-cache nodejs curl unzip bash npm
fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz
(1/7) Installing curl (7.61.1-r3)
(2/7) Installing c-ares (1.14.0-r0)
(3/7) Installing http-parser (2.8.1-r0)
(4/7) Installing libuv (1.20.2-r0)
(5/7) Installing nodejs (8.14.0-r0)
(6/7) Installing npm (8.14.0-r0)
(7/7) Installing unzip (6.0-r6)
Executing busybox-1.28.4-r3.trigger
OK: 250 MiB in 70 packages

after

apk update -q && apk add --no-cache nodejs curl unzip bash npm
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz
(1/6) Installing curl (7.67.0-r0)
(2/6) Installing c-ares (1.15.0-r0)
(3/6) Installing libuv (1.34.0-r0)
(4/6) Installing nodejs (12.15.0-r1)
(5/6) Installing npm (12.15.0-r1)
(6/6) Installing unzip (6.0-r6)
Executing busybox-1.31.1-r9.trigger
OK: 284 MiB in 70 packages

as a result, many dependencies collapse. Changing the tag without replacing the old one would solve this problem