Update join-mainnet.md (#813)

update to include an additional seed node.

docs/gaia-tutorials/join-mainnet.md

@@ -7,29 +7,41 @@ order: 3
 
 ## Quickstart
 
-**Instant Gratification Snippet**
+**Get Ready**
+Note: You'll need Go v1.16 or higher.
 
+This will:
+
+* Compile gaia
+* give your node a moniker and configure it
+* download compressed genesis state
+* put genesis.json in the correct location
 ```bash
-git clone -b v4.2.0 https://github.com/cosmos/gaia
+git clone -b v4.2.1 https://github.com/cosmos/gaia
 cd gaia
 make install
 gaiad init chooseanicehandle
 wget https://github.com/cosmos/mainnet/raw/master/genesis.cosmoshub-4.json.gz
 gzip -d genesis.cosmoshub-4.json.gz
 mv genesis.cosmoshub-4.json ~/.gaia/config/genesis.json
-gaiad start --p2p.seeds bf8328b66dceb4987e5cd94430af66045e59899f@public-seed.cosmos.vitwit.com:26656,[email protected]:26656,[email protected]:26656,ba3bacc714817218562f743178228f23678b2873@public-seed-node.cosmoshub.certus.one:26656,[email protected]:26656 --x-crisis-skip-assert-invariants
+```
+
+**Go**
+Starts Gaia
+```bash
+gaiad start --p2p.seeds bf8328b66dceb4987e5cd94430af66045e59899f@public-seed.cosmos.vitwit.com:26656,[email protected]:26656,[email protected]:26656,ba3bacc714817218562f743178228f23678b2873@public-seed-node.cosmoshub.certus.one:26656,[email protected]:26656,[email protected]:26656 --x-crisis-skip-assert-invariants
 ```
 
 Note:  If your node is unable to connect to any of the seeds listed here, you can find seeds and peers in [this document](https://hackmd.io/@KFEZk8oMTz6vBlwADz0M4A/BkKEUOsZu#) maintained by community members, and at [Atlas](https://atlas.cosmos.network/nodes), which is automatically generated by crawling the network.
 
 If you'd like to save those seeds to your settings put them in ~/.gaia/config/config.toml in the p2p section under seeds in the same comma-separated list format.
 
-**You need to [install gaia](./installation.md) before you go further**
-
-**Gaia nodes on cosmoshub-4 take about 45 min to startup. The development team are evaluating [solutions](https://github.com/cosmos/cosmos-sdk/issues/7766).**
 
 ## Setting Up a New Node
 
+**You need to [install gaia](./installation.md) before you go further**
+
+
 These instructions are for setting up a brand new full node from scratch.
 
 First, initialize the node and create the necessary config files: