Dead link fixes and other small improvements to the fluffy book (#1859)

fluffy/README.md

@@ -11,7 +11,7 @@
 ## Introduction
 
 Fluffy is the Nimbus client implementation of the
-[Portal network specifications](https://github.com/ethereum/portal-network-specs/blob/master/portal-network.md).
+[Portal network specifications](https://github.com/ethereum/portal-network-specs).
 
 You can find all the information you need to run a Fluffy node in
 [The Fluffy Book](https://status-im.github.io/nimbus-eth1).

fluffy/docs/the_fluffy_book/docs/basics-for-developers.md

@@ -14,7 +14,7 @@ E.g.:
 <!-- TODO: Add most important development tips from following page here and
 remove the link -->
 
-More [development tips](https://github.com/status-im/nimbus-eth1/README.md#devel-tips)
+More [development tips](https://github.com/status-im/nimbus-eth1/blob/master/README.md#devel-tips)
 can be found on the general nimbus-eth1 readme.
 
 The code follows the

fluffy/docs/the_fluffy_book/docs/index.md

@@ -1,7 +1,7 @@
 # The Nimbus Fluffy Guide
 
 Fluffy is the Nimbus client implementation of the
-[Portal network specifications](https://github.com/ethereum/portal-network-specs/blob/master/portal-network.md).
+[Portal network specifications]https://github.com/ethereum/portal-network-specs).
 
 The Portal Network aims to deliver a reliable, sync-free, and decentralized
 access to the Ethereum blockchain. The network can be used by a light client to

fluffy/docs/the_fluffy_book/docs/prerequisites.md

@@ -46,10 +46,10 @@ installed:
         !!! note
             If the online installer isn't working you can try installing `mingw-w64` through [MSYS2](https://www.msys2.org/).
 
-    - Install [cmake](https://cmake.org/).
+    - Install [CMake](https://cmake.org/).
 
     - Install [Git for Windows](https://gitforwindows.org/) and use a "Git Bash"
-    shell to clone nimbus-eth1 and build fluffy.
+    shell to clone nimbus-eth1 and build Fluffy.
 
 
 === "Android"

fluffy/docs/the_fluffy_book/docs/quick-start-windows.md

@@ -12,21 +12,15 @@ The guide assumes Windows is being used. For Linux/macOS users follow this
 ## Steps
 
 ### Prerequisites
-- Install & setup Mingw-w64:
-    - Download Mingw-w64 for your architecture using the "[MinGW-W64 Online
-    Installer](https://sourceforge.net/projects/mingw-w64/files/)" (first link
-    under the directory listing).
-    - Run it and select your architecture in the setup
-    menu ("i686" on 32-bit, "x86\_64" on 64-bit), set the threads to "win32" and
-    the exceptions to "dwarf" on 32-bit and "seh" on 64-bit. Change the
-    installation directory to "C:\mingw-w64".
-    - Add it to your system PATH in "My Computer"/"This PC" -> Properties ->
-    Advanced system settings -> Environment Variables -> Path -> Edit -> New -> C:\mingw-w64\mingw64\bin (it's "C:\mingw-w64\mingw32\bin" on 32-bit)
+- Developer tools (C compiler, Make, Bash, CMake, Git 2.9.4 or newer)
 
-- Install [cmake](https://cmake.org/).
+If you need help installing these tools, you can consult our
+[prerequisites page](./prerequisites.md).
 
-- Install [Git for Windows](https://gitforwindows.org/) and use a "Git Bash"
-shell to clone and build Fluffy in the next steps.
+!!! note
+    To build Fluffy on Windows, the MinGW-w64 build environment is recommended.
+    The build commands in the rest of this page assume the MinGW build
+    environment is used.
 
 ### Build the Fluffy client
 ```bash

fluffy/docs/the_fluffy_book/docs/quick-start.md

@@ -9,7 +9,10 @@ The guide assumes Linux or macOS is being used. For Windows users follow this
 ## Steps
 
 ### Prerequisites
-- GNU Make, Bash and the usual POSIX utilities. Git 2.9.4 or newer.
+- Developer tools (C compiler, Make, Bash, CMake, Git 2.9.4 or newer)
+
+If you need help installing these tools, you can consult our
+[prerequisites page](./prerequisites.md).
 
 ### Build the Fluffy client
 ```bash

fluffy/docs/the_fluffy_book/docs/testnet-beacon-network.md

@@ -22,7 +22,7 @@ activated.
 TRUSTED_BLOCK_ROOT=0x1234567890123456789012345678901234567890123456789012345678901234 # Replace with trusted block root.
 
 # Run the script, start 8 nodes + beacon_chain_bridge
-./fluffy/scripts/launch_local_testnet.sh -n8 --trusted-block-root ${TRUSTED_BLOCK_ROOT}--beacon-chain-bridge
+./fluffy/scripts/launch_local_testnet.sh -n8 --trusted-block-root ${TRUSTED_BLOCK_ROOT} --beacon-chain-bridge
 ```
 
 ## Run the local testnet script and launch the bridge manually
@@ -37,9 +37,11 @@ TRUSTED_BLOCK_ROOT=0x12345678901234567890123456789012345678901234567890123456789
 ./fluffy/scripts/launch_local_testnet.sh -n8 --trusted-block-root ${TRUSTED_BLOCK_ROOT}
 ```
 
-Next, start the `beacon_chain_bridge`
+Next, build and run the `beacon_chain_bridge`
 
 ```bash
+make beacon_chain_bridge
+
 # --rpc-port 10000 = default node0
 # --rest-url = access to beacon node API, default http://127.0.0.1:5052
 ./build/beacon_chain_bridge --trusted-block-root:${TRUSTED_BLOCK_ROOT} --rest-url:http://127.0.0.1:5052 --backfill-amount:128 --rpc-port:10000