Preset LANG to en_US.UTF-8

[ekrivenja-sequenex]

The issue related to
https://confluence.atlassian.com/bitbucketserverkb/accented-or-extended-utf-8-characters-cause-malformed-input-or-input-contains-unmappable-characters-error-966062671.html

On Bitbucket pipeline some Gradle builds could crash with message:

Malformed input or input contains unmappable characters: #class path#

The image locale returns

LANG=
LANGUAGE=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

My issue is with Cucumber library. Exactly same as reported there:
cucumber/cucumber-android#41

Fixed by set export LANG="en_US.UTF-8" and run

apt-get clean && apt-get update -qq && apt-get install -qq -y apt-utils locales
locale-gen $LANG

before Gradle build run. But nice to see it as image default locale.