Add deb and RPM repository config and documentation

Cargo.toml

@@ -4,6 +4,8 @@ path = "src/main.rs"
 
 [package]
 name = "polkadot"
+description = "Implementation of a https://polkadot.network node in Rust based on the Substrate framework."
+license = "GPL-3.0-only"
 version = "0.8.23"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
@@ -77,3 +79,23 @@ runtime-benchmarks=["cli/runtime-benchmarks"]
 service-rewr= [
 	"cli/service-rewr",
 ]
+
+# Configuration for building a .deb package - for use with `cargo-deb`
+[package.metadata.deb]
+name = "polkadot"
+extended-description = "Implementation of a https://polkadot.network node in Rust based on the Substrate framework."
+maintainer = "martin@parity.io"
+license-file = ["LICENSE", "0"]
+assets = [
+	["target/release/polkadot", "usr/bin/", "755"]
+]
+
+# Configuration for building an .rpm package - for use with `cargo-rpm`
+[package.metadata.rpm]
+package = "polkadot"
+
+[package.metadata.rpm.cargo]
+buildflags = ["--release"]
+
+[package.metadata.rpm.targets]
+polkadot = { path = "/usr/bin/polkadot" }

README.md

@@ -12,12 +12,43 @@ information about installing the `polkadot` binary and developing on the codebas
 specific guides, like how to be a validator, see the
 [Polkadot Wiki](https://wiki.polkadot.network/docs/en/).
 
-## Building
+## Installation
+
+If you just wish to run a Polkadot node without compiling it yourself, you may
+either run the latest binary from our
+[releases](https://github.com/paritytech/polkadot/releases) page, or install
+Polkadot from one of our package repositories.
+
+### Debian-based (Debian, Ubuntu)
+
+Currently supports Debian 10 (Buster) and Ubuntu 20.04 (Focal), and derivatives.
 
-### Use a Provided Binary
+```
+# Import the security@parity.io GPG key
+curl -fsSL 'https://keys.mailvelope.com/pks/lookup?op=get&search=security%40parity.io&options=mr&exact=on' | apt-key add -
+# Add the Parity repository and update the package index
+echo 'deb https://releases.parity.io/deb buster main' >> /etc/apt/sources.list.d/parity.list
+apt update
+# Install polkadot
+apt install polkadot
+
+```
 
-If you want to connect to one of the networks supported by this repo, you can go to the latest
-release and download the binary that is provided.
+### RPM-based (Fedora, CentOS)
+
+Currently supports Fedora 32 and CentOS 8, and derivatives.
+
+```
+# Install dnf-plugins-core (This might already be installed)
+dnf install dnf-plugins-core
+# Add the repository and enable it
+dnf config-manager --add-repo https://releases.parity.io/rpm/polkadot.repo
+dnf config-manager --set-enabled polkadot
+# Install polkadot (You may have to confirm the import of the GPG key)
+dnf install polkadot
+```
+
+## Building
 
 ### Install via Cargo