docker-unifi-network-application/root/etc/s6-overlay/s6-rc.d/init-unifi-network-application-config/run

#!/usr/bin/with-contenv bash
# shellcheck shell=bash

# create our folders
mkdir -p \
    /config/{data,logs}

# create symlinks for config
symlinks=( \
/usr/lib/unifi/data \
/usr/lib/unifi/logs )

for i in "${symlinks[@]}"; do
    if [[ -L "$i" && ! "$i" -ef /config/"$(basename "$i")"  ]]; then
        unlink "$i"
    fi
    if [[ ! -L "$i" ]]; then
        ln -s /config/"$(basename "$i")" "$i"
    fi
done

if [[ ! -e /config/data/system.properties ]]; then
    if [[ -z "${MONGO_HOST}" ]]; then
        echo "*** No MONGO_HOST set, cannot configure database settings. ***"
        sleep infinity
    elif ! nc -w1 "${MONGO_HOST}" ${MONGO_PORT}; then
        echo "*** Defined MONGO_HOST is not reachable, cannot proceed. ***"
        sleep infinity
    else
        sed -i "s/~MONGO_USER~/${MONGO_USER}/" /defaults/system.properties
        sed -i "s/~MONGO_HOST~/${MONGO_HOST}/" /defaults/system.properties
        sed -i "s/~MONGO_PORT~/${MONGO_PORT}/" /defaults/system.properties
        sed -i "s/~MONGO_DBNAME~/${MONGO_DBNAME}/" /defaults/system.properties
        sed -i "s/~MONGO_PASS~/${MONGO_PASS}/" /defaults/system.properties
        cp /defaults/system.properties /config/data
    fi
fi

# generate key
if [[ ! -f /config/data/keystore ]]; then
    keytool -genkey -keyalg RSA -alias unifi -keystore /config/data/keystore \
    -storepass aircontrolenterprise -keypass aircontrolenterprise -validity 3650 \
    -keysize 4096 -dname "cn=unifi" -ext san=dns:unifi
fi

# permissions
lsiown -R abc:abc \
	/config \
	/run/unifi

lsiown abc:abc \
    /config/data/keystore