docker (compose): test environment variable + network alias: `SAT_TEST_ENV_E2E` is set to `1` to indicate that e2e environment requirement are available (notably specific accounts and hosts created). The e2e tests needing it won't be launched if this variable is not set. A network alias is set for the backend at `sat.test` (to have a tld available, needed for some network libraries like OpenSSL).

#!/bin/bash
set -e

usermod -u "$(stat -c %u /var/lib/prosody/.)" prosody

if [[ "$1" != "prosody" ]]; then
    exec prosodyctl "$@"
    exit 0;
fi

if [ "$LOCAL" -a  "$PASSWORD" -a "$DOMAIN" ] ; then
    prosodyctl register "$LOCAL" "$DOMAIN" "$PASSWORD"
fi

exec runuser -u prosody -- "$@"