Add circleci tests

.circleci/test-install.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+cd ..
+
+export BTCPAY_HOST="btcpay.example.local"
+export NBITCOIN_NETWORK="mainnet"
+export BTCPAYGEN_CRYPTO1="btc"
+export BTCPAYGEN_CRYPTO2="ltc"
+export BTCPAYGEN_REVERSEPROXY="nginx"
+export BTCPAYGEN_LIGHTNING="clightning"
+source ./btcpay-setup.sh -i
+
+timeout 10m bash test-connectivity.sh
+
+# Testing scripts are not crashing and installed
+btcpay-up.sh
+btcpay-update.sh
+btcpay-down.sh