container: root: macro: add bitcoin plugin support

- Adds support to existing macros for bitcoin's RNG via `dfi`'s `Random`
  * Currently only supports one of bitcoin's RNG's (`FastRandomContext`)

container/src/root/macro/web/internal/crypto.C

@@ -351,6 +351,15 @@ class Random final
 
     const std::string timestamp{common::make_timestamp()};
 
+#ifdef __DFI_PLUGIN_BITCOIN__
+    data.title = "Bitcoin_FastRandomContext_32_RNG_" + timestamp;
+    random(data, []() -> uint32_t {
+      return common::crypto::bitcoin::g_Random->generate();
+    });
+
+    // TODO(afiore): uint64_t (requires canvas-related refactor)
+#endif
+
     data.title = "Botan_RNG_" + timestamp;
     random(data, []() -> uint32_t {
       return common::crypto::botan::g_Random->generate();