Node guide: Add debug info & linux requiremen, remove ruby version for local installation (#576)

* Add debug info, linux requirement and remove ruby version for local install

* Update linux instructions

based on #575

Gemfile

@@ -1,5 +1,4 @@
 source "https://rubygems.org"
-ruby '~> 2.5.1'
 
 # Hello! This is where you manage which Jekyll version is used to run.
 # When you want to use a different version, change it below, save the

Gemfile.lock

@@ -121,8 +121,5 @@ DEPENDENCIES
   jekyll-toc
   tzinfo-data
 
-RUBY VERSION
-   ruby 2.5.1p57
-
 BUNDLED WITH
-   1.16.6
+   1.17.3

_core/smart/neon-node.md

@@ -11,6 +11,13 @@ permalink: /:collection/:path.html
 * TOC
 {:toc}
 
+### Prerequisites
+Note: If you use Linux, you may need to manually install [`libssl-dev`](https://wiki.openssl.org/index.php/Libssl_API) and other packages. In your command line, run the following to get all packages:
+
+```bash
+sudo apt-get install build-essential cmake libssl-dev pkg-config
+```
+
 ### Download and install the `stacks-blockchain` repository
 
 The first step is to ensure that you have Rust and the support software installed.
@@ -72,4 +79,12 @@ The above code will compile an optimized binary. To use it, run:
 
 ```bash
 ./target/release/stacks-node ./testnet/conf/neon-follower-conf.toml
-```
+```
+
+### Enable debug logging
+
+In case you are running into issues or would like to see verbose logging, you can run your node with debug logging enabled. In the command line, run:
+
+```bash
+BLOCKSTACK_DEBUG=1 stacks-node neon
+```