fix: Add hotfix script to fix not working integration tests on macOS

misc/setup-loopback-addresses.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# TODO: Consider finding a better method than running the script.
+# On macOS, unlike Linux, loopback addresses other than 127.0.0.1 are not assigned by default, which may cause integration tests to fail. 
+# In that case, please run the following script first.
+
+# TODO: Support other octets as well, not just the last octet.
+for i in {1..254}; do
+    if [[ "$(uname)" == "Darwin" ]]; then
+        sudo ifconfig lo0 alias 127.0.0.$i up
+    elif [[ "$(uname)" == "Linux" ]]; then
+        sudo ifconfig lo:0 127.0.0.$i netmask 255.0.0.0 up
+    else
+        echo "Unsupported OS"
+        exit 1
+    fi
+done