Update Elixir parent to 1.7

As of [recently](58b12c09db) Pleroma requires Elixir 1.7.
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Adrian Malacoda 2018-12-31 15:05:55 -06:00 committed by GitHub
parent fbfa9f2172
commit 3baf998bb6
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@ -1,4 +1,4 @@
FROM elixir:1.6-alpine
FROM elixir:1.7-alpine
ENV UID=911 GID=911 \
MIX_ENV=prod