Update doc (#772)

* add missing dependencies for linux
* update node version

docs/build.md

@@ -11,7 +11,7 @@
 
 ## <a id="dependencies"></a>Dependencies
 
-- node 12
+- node 14
 - yarn
 - jq
 
@@ -22,6 +22,8 @@
 - libsecret-1-dev
 - fakeroot
 - rpm
+- rpmbuild
+- dpkg
 
 ### <a id="dependencies-macos"></a>MacOS
 
@@ -50,7 +52,7 @@ docker run -ti --volume=<local vscodium source>:/root/vscodium --name=vscodium-b
 
 When inside the container, you can use the following commands to build:
 ```
-curl -fsSL https://deb.nodesource.com/setup_12.x | sudo -E bash -
+curl -fsSL https://deb.nodesource.com/setup_14.x | sudo -E bash -
 sudo apt-get install -y nodejs
 
 npm install -g yarn