feat: add FreeRADIUS configuration and containerization support with PostgreSQL integration

radiuscontroller/raddb/sites-enabled/inner-tunnel

@@ -0,0 +1,36 @@
+server inner-tunnel {
+authorize {
+	filter_username
+	chap
+	mschap
+	pap
+	eap {
+		ok = return
+	}
+	sql
+	expiration
+	logintime
+}
+
+authenticate {
+	Auth-Type PAP {
+		pap
+	}
+	Auth-Type CHAP {
+		chap
+	}
+	Auth-Type MS-CHAP {
+		mschap
+	}
+	mschap
+	eap
+}
+
+post-auth {
+	sql
+	Post-Auth-Type REJECT {
+		sql
+		attr_filter.access_reject
+	}
+}
+}