Docker node 12 node-pre-gyp WARN bcypt 3.06

[Ryan-P-Walsh]

What are the steps to reproduce?

Using docker-custom, I have cloned the repo and altered the installDevTools.sh script to add in the advanced config: adafruit neopixel and motorhat libraries.
I have also changed the docker-make.sh to use the build argument ARCH=arm32v7.

What happens?

It appears the bcrypt 3.06 won't install using pre-built binaries along with version 12 of node:

> bcrypt@3.0.6 install /usr/src/node-red/node_modules/bcrypt
> node-pre-gyp install --fallback-to-build

node-pre-gyp WARN Using request for node-pre-gyp https download
node-pre-gyp WARN Tried to download(404): https://github.com/kelektiv/node.bcrypt.js/releases/download/v3.0.6/bcrypt_lib-v3.0.6-node-v72-linux-arm-musl.tar.gz
node-pre-gyp WARN Pre-built binaries not found for bcrypt@3.0.6 and node@12.11.1 (node-v72 ABI, musl) (falling back to source compile with node-gyp)
make: Entering directory '/usr/src/node-red/node_modules/bcrypt/build'
  CXX(target) Release/obj.target/bcrypt_lib/src/blowfish.o
  CXX(target) Release/obj.target/bcrypt_lib/src/bcrypt.o
  CXX(target) Release/obj.target/bcrypt_lib/src/bcrypt_node.o
In file included from ../src/bcrypt_node.cc:1:
../../nan/nan.h: In function 'void Nan::AsyncQueueWorker(Nan::AsyncWorker*)':
../../nan/nan.h:2232:62: warning: cast between incompatible function types from 'void (*)(uv_work_t*)' {aka 'void (*)(uv_work_s*)'} to 'uv_after_work_cb' {aka 'void (*)(uv_work_s*, int)'} [-Wcast-function-type]
     , reinterpret_cast<uv_after_work_cb>(AsyncExecuteComplete)
                                                              ^
In file included from ../../nan/nan.h:53,
                 from ../src/bcrypt_node.cc:1:
../src/bcrypt_node.cc: At global scope:
/root/.cache/node-gyp/12.11.1/include/node/node.h:560:43: warning: cast between incompatible function types from 'void (*)(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE)' {aka 'void (*)(v8::Local<v8::Object>)'} to 'node::addon_register_func' {aka 'void (*)(v8::Local<v8::Object>, v8::Local<v8::Value>, void*)'} [-Wcast-function-type]
       (node::addon_register_func) (regfunc),                          \
                                           ^
/root/.cache/node-gyp/12.11.1/include/node/node.h:594:3: note: in expansion of macro 'NODE_MODULE_X'
   NODE_MODULE_X(modname, regfunc, NULL, 0)  // NOLINT (readability/null_usage)
   ^~~~~~~~~~~~~
../src/bcrypt_node.cc:378:1: note: in expansion of macro 'NODE_MODULE'
 NODE_MODULE(bcrypt_lib, init);
 ^~~~~~~~~~~
In file included from /root/.cache/node-gyp/12.11.1/include/node/node.h:63,
                 from ../../nan/nan.h:53,
                 from ../src/bcrypt_node.cc:1:
/root/.cache/node-gyp/12.11.1/include/node/v8.h: In instantiation of 'void v8::PersistentBase<T>::SetWeak(P*, typename v8::WeakCallbackInfo<P>::Callback, v8::WeakCallbackType) [with P = node::ObjectWrap; T = v8::Object; typename v8::WeakCallbackInfo<P>::Callback = void (*)(const v8::WeakCallbackInfo<node::ObjectWrap>&)]':
/root/.cache/node-gyp/12.11.1/include/node/node_object_wrap.h:84:78:   required from here
/root/.cache/node-gyp/12.11.1/include/node/v8.h:10004:16: warning: cast between incompatible function types from 'v8::WeakCallbackInfo<node::ObjectWrap>::Callback' {aka 'void (*)(const v8::WeakCallbackInfo<node::ObjectWrap>&)'} to 'Callback' {aka 'void (*)(const v8::WeakCallbackInfo<void>&)'} [-Wcast-function-type]
                reinterpret_cast<Callback>(callback), type);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/.cache/node-gyp/12.11.1/include/node/v8.h: In instantiation of 'void v8::PersistentBase<T>::SetWeak(P*, typename v8::WeakCallbackInfo<P>::Callback, v8::WeakCallbackType) [with P = Nan::ObjectWrap; T = v8::Object; typename v8::WeakCallbackInfo<P>::Callback = void (*)(const v8::WeakCallbackInfo<Nan::ObjectWrap>&)]':
../../nan/nan_object_wrap.h:65:61:   required from here
/root/.cache/node-gyp/12.11.1/include/node/v8.h:10004:16: warning: cast between incompatible function types from 'v8::WeakCallbackInfo<Nan::ObjectWrap>::Callback' {aka 'void (*)(const v8::WeakCallbackInfo<Nan::ObjectWrap>&)'} to 'Callback' {aka 'void (*)(const v8::WeakCallbackInfo<void>&)'} [-Wcast-function-type]
  SOLINK_MODULE(target) Release/obj.target/bcrypt_lib.node
  COPY Release/bcrypt_lib.node
  COPY /usr/src/node-red/node_modules/bcrypt/lib/binding/bcrypt_lib.node
  TOUCH Release/obj.target/action_after_build.stamp
make: Leaving directory '/usr/src/node-red/node_modules/bcrypt/build'
npm notice created a lockfile as package-lock.json. You should commit this file.
added 331 packages from 341 contributors and audited 1296 packages in 55.072s
found 0 vulnerabilities

What do you expect to happen?

Dockerfile build without warnings.
It appears node 12 may not work natively with prebuilt binaries for node.bcrypt.js 3.0.6. This doesn't appear to be a node-red-docker issue, so hoping that raising the issue to mitigate it and possibly reduce the docker build size.

Please tell us about your environment:

Platform/OS:
RaspberryPi 4 - Raspbian Buster Lite

Note:
Moved from node-red-docker issue tracking.

[recrsn]

Typically the pre-built libraries lag a bit. It takes a while to upload them for every new release