Fix application.properties syntax issue #159
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In application.properties the value of the variable
${DOCKER_HOST_IP:localhost}
is supposed to be "localhost" in case DOCKER_HOST_IP is unset, but it doesn't work.
FIX
The correct syntax to do that is
${DOCKER_HOST_IP:-localhost}
with a "-" before localhost
https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html