Add $TIMEZONE environment variable

[walkerlee]

Short Description:

Using $TIMEZONE env variable to change docker container's timezone

Fixes:

• add build timezone args in docker-compose.yml #4234

Set environment TIMEZONE=Etc/UTC

⋊> ~/h/PokemonGo-Bot on update-dockerfile ⨯ docker-compose up
Creating pokemongobot_bot1-pokego_1
Creating pokemongobot_bot1-pokegoweb_1
Attaching to pokemongobot_bot1-pokego_1, pokemongobot_bot1-pokegoweb_1
bot1-pokegoweb_1  | Serving HTTP on 0.0.0.0 port 8000
bot1-pokego_1     | 2016-08-30 17:52:20,815 [       cli] [INFO] PokemonGO Bot v1.0
bot1-pokego_1     | 2016-08-30 17:52:20,822 [       cli] [INFO] commit: not found

Set environment TIMEZONE=Asia/Taipei

⋊> ~/h/PokemonGo-Bot on update-dockerfile ⨯ docker-compose up
Recreating pokemongobot_bot1-pokego_1
Recreating pokemongobot_bot1-pokegoweb_1
Attaching to pokemongobot_bot1-pokego_1, pokemongobot_bot1-pokegoweb_1
bot1-pokegoweb_1  | Serving HTTP on 0.0.0.0 port 8000
bot1-pokego_1     | 2016-08-31 01:52:42,717 [       cli] [INFO] PokemonGO Bot v1.0
bot1-pokego_1     | 2016-08-31 01:52:42,726 [       cli] [INFO] commit: not found

[mention-bot]

@walkerlee, thanks for your PR! By analyzing the annotation information on this pull request, we identified @nivong, @solderzzc and @th3w4y to be potential reviewers

[solderzzc]

👍