Added musl x64 builds to CI

refs #1576

- this commit adds musl prebuilt binaries to CI via Alpine
- also updates the docs to reference the new targets

.github/workflows/ci.yml

@@ -92,6 +92,11 @@ jobs:
         variant:
           - bullseye
           - alpine
+        include:
+          # musl x64 builds
+          - architecture: linux/amd64
+            variant: alpine
+            node: 16
     name: ${{ matrix.variant }} ${{ matrix.architecture }} - Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v3

README.md

@@ -43,12 +43,14 @@ Format: `napi-v{napi_build_version}-{platform}-{libc}-{arch}`
 * `napi-v3-linux-glibc-arm64`
 * `napi-v3-linux-glibc-x64`
 * `napi-v3-linux-musl-arm64`
+* `napi-v3-linux-musl-x64`
 * `napi-v3-win32-unknown-ia32`
 * `napi-v3-win32-unknown-x64`
 * `napi-v6-darwin-unknown-x64`
 * `napi-v6-linux-glibc-arm64`
 * `napi-v6-linux-glibc-x64`
 * `napi-v6-linux-musl-arm64`
+* `napi-v6-linux-musl-x64`
 * `napi-v6-win32-unknown-ia32`
 * `napi-v6-win32-unknown-x64`