Merge #14950: docs: add NSIS setup/install steps to windows docs

82687b5 docs: add NSIS setup/install steps to windows docs (luciana)

Pull request description:

  Supersedes #14744
  Fixes: #14699

  Rearranged the changes in #14744 to be more similar to the macOS docs.

Tree-SHA512: d68f952eee1a97702d23a02e4f35b66dedd3bf104b8ea05de9a642a596c476c40aa76fae5b00a1600b3758e25621226d89216885ec8f52acf89d6eb117421f9e

Author: MarcoFalke

doc/build-windows.md

@@ -65,7 +65,11 @@ A host toolchain (`build-essential`) is necessary because some dependency
 packages (such as `protobuf`) need to build host utilities that are used in the
 build process.
 
-See also: [dependencies.md](dependencies.md).
+See [dependencies.md](dependencies.md) for a complete overview.
+
+If you want to build the windows installer with `make deploy` you need [NSIS](https://nsis.sourceforge.io/Main_Page):
+
+    sudo apt install nsis
 
 ## Building for 64-bit Windows
 
@@ -139,6 +143,10 @@ way. This will install to `c:\workspace\bitcoin`, for example:
 
     make install DESTDIR=/mnt/c/workspace/bitcoin
 
+You can also create an installer using:
+
+    make deploy
+
 Footnotes
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