diff --git a/configure-container.sh b/configure-container.sh
new file mode 100755
index 0000000..d08c7f3
--- /dev/null
+++ b/configure-container.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+set -eu
+
+script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+helper_path="$script_dir/git-credential-hostproxy"
+scope='global'
+target_repo=$(pwd)
+
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    --global)
+      scope='global'
+      ;;
+    --local)
+      scope='local'
+      ;;
+    --repo)
+      shift
+      if [ "$#" -eq 0 ]; then
+        printf 'Missing value for --repo\n' >&2
+        exit 1
+      fi
+      target_repo="$1"
+      ;;
+    *)
+      printf 'Usage: %s [--global|--local] [--repo PATH]\n' "$0" >&2
+      exit 1
+      ;;
+  esac
+  shift
+done
+
+if [ "$scope" = 'global' ]; then
+  git config --global --replace-all credential.helper ''
+  git config --global --add credential.helper "$helper_path"
+  git config --global credential.useHttpPath true
+  printf 'Configured global Git credential helper: %s\n' "$helper_path"
+else
+  git -C "$target_repo" config --local --replace-all credential.helper ''
+  git -C "$target_repo" config --local --add credential.helper "$helper_path"
+  git -C "$target_repo" config --local credential.useHttpPath true
+  printf 'Configured local Git credential helper for %s\n' "$target_repo"
+fi
+
+printf 'Proxy URL default: %s\n' "${GIT_CRED_PROXY_URL:-http://host.docker.internal:18765}"
+printf 'Protocol filter is configured on the host side\n'
diff --git a/git-credential-hostproxy b/git-credential-hostproxy
new file mode 100755
index 0000000..ebb8bba
--- /dev/null
+++ b/git-credential-hostproxy
@@ -0,0 +1,19 @@
+#!/bin/sh
+set -eu
+
+script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+
+if [ -n "${GIT_CRED_PROXY_RUNTIME:-}" ]; then
+  exec "$GIT_CRED_PROXY_RUNTIME" "$script_dir/helper.mjs" "$@"
+fi
+
+if command -v bun >/dev/null 2>&1; then
+  exec bun "$script_dir/helper.mjs" "$@"
+fi
+
+if command -v node >/dev/null 2>&1; then
+  exec node "$script_dir/helper.mjs" "$@"
+fi
+
+printf 'Either bun or node is required to run git-credential-hostproxy\n' >&2
+exit 1