Enforce git config on startup (#383)

internal/git/config.go

@@ -0,0 +1,23 @@
+package git
+
+import "os/exec"
+
+func InitGitConfig() error {
+	configs := map[string]string{
+		"receive.advertisePushOptions": "true",
+		"safe.directory":               "*",
+	}
+
+	for key, value := range configs {
+		if err := setGitConfig(key, value); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func setGitConfig(key, value string) error {
+	cmd := exec.Command("git", "config", "--global", key, value)
+	return cmd.Run()
+}