Github Actions: upload resulting DMG on macOS

Add infos about nightly builds.

.github/workflows/build.yml

@@ -113,5 +113,11 @@ jobs:
       run: |
         mkdir build
         cd build
-        CC=$(brew --prefix llvm)/bin/clang CXX=$(brew --prefix llvm)/bin/clang++ PKG_CONFIG_PATH="$(brew --prefix openssl)/lib/pkgconfig":"$(brew --prefix)/lib/pkgconfig" cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE ..
-        make -j 4
+        CC=$(brew --prefix llvm)/bin/clang CXX=$(brew --prefix llvm)/bin/clang++ PKG_CONFIG_PATH="$(brew --prefix openssl)/lib/pkgconfig":"$(brew --prefix)/lib/pkgconfig" cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCREATE_BUNDLE=ON -DCREATE_PACKAGE=ON ..
+        make -j 4 package
+
+    - name: 📦 Uploading artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: macOS DMG
+        path: build/*.dmg

README.md

@@ -89,6 +89,12 @@ If you like my work, please consider supporting me on GitHub Sponsors, Patreon o
 
 For format patterns, includable libraries and magic files, check out the [ImHex-Patterns](https://github.com/WerWolv/ImHex-Patterns) repository. Feel free to PR your own files there as well!
 
+## Nightly builds
+
+See latest nightly builds on the artifacts result of the Build action [here](https://github.com/WerWolv/ImHex/actions?query=workflow%3ABuild).
+
+NOTE: **We currently only provide nightly builds for macOS (x86_64)**
+
 ## Compiling
 
 You need a C++20 compatible compiler such as GCC 10.2.0 to compile ImHex. Moreover, the following dependencies are needed for compiling ImHex: