Setup fly.io deployment

rel/env.sh.eex

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+#!/bin/sh
+
+# configure node for distributed erlang with IPV6 support
+export ERL_AFLAGS="-proto_dist inet6_tcp"
+export ECTO_IPV6="true"
+export DNS_CLUSTER_QUERY="${FLY_APP_NAME}.internal"
+export RELEASE_DISTRIBUTION="name"
+export RELEASE_NODE="${FLY_APP_NAME}-${FLY_IMAGE_REF##*-}@${FLY_PRIVATE_IP}"
+
+# Uncomment to send crash dumps to stderr
+# This can be useful for debugging, but may log sensitive information
+# export ERL_CRASH_DUMP=/dev/stderr
+# export ERL_CRASH_DUMP_BYTES=4096

rel/overlays/bin/migrate

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+#!/bin/sh
+set -eu
+
+cd -P -- "$(dirname -- "$0")"
+exec ./music_library eval MusicLibrary.Release.migrate

rel/overlays/bin/migrate.bat

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+call "%~dp0\music_library" eval MusicLibrary.Release.migrate

rel/overlays/bin/server

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+#!/bin/sh
+set -eu
+
+cd -P -- "$(dirname -- "$0")"
+PHX_SERVER=true exec ./music_library start

rel/overlays/bin/server.bat

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+set PHX_SERVER=true
+call "%~dp0\music_library" start