docs: add remix guide (#413)

* working on remix guide

* add remix guide

* Apply suggestions from code review

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

docs/guides/README.md

@@ -10,3 +10,4 @@ This section contains different guides to use polular Ethereum tools with Etherm
 
 1. [Truffle](./truffle.md)
 2. [Metamask](./metamask.md)
+3. [Remix](./remix.md)

docs/guides/remix.md

@@ -0,0 +1,43 @@
+<!--
+order: 3
+-->
+
+# Remix
+
+Set up a Remix Ethermint local development environment. {synopsis}
+
+## Pre-requisite Readings
+
+- [Installation](./../quickstart/installation.md) {prereq}
+- [Run a node](./../quickstart/run_node.md) {prereq}
+- [Metamask](./metamask.md) {prereq}
+
+[Remix](http://remix.ethereum.org/) is an in-browser IDE for [Solidity](https://github.com/ethereum/solidity) smart contracts. In this guide, we will learn how to deploy a contract to a running Ethermint network through Remix and interact with it.
+
+## Connect Ethermint account to Remix
+
+First, follow the steps in the [Metamask guide](./metamask.md) to import your Ethermint private key into Metamask. Start the Ethermint daemon and rest server.
+
+Once that is complete, go to [Remix](http://remix.ethereum.org/). There are some contracts in the File Explorer. Select any of these contracts.  In this example, we use `Counter.sol` from the [Truffle](./truffle.md) guide. On the left-most bar, select the Solidity Compiler and compile the contract.
+
+Next, select the `Deploy and Run` option. Select `injected web3` as the environment. This will open a metamask popup for you to confirm connecting your Metamask to Remix. Hit confirm. 
+
+You should see your account show up in the left-hand panel.
+
+![remix connected to ethermint](./img/remix_deploy.png)
+
+## Deploy and Interact
+
+Now that your account is connected, you are able to deploy the contract. Press the `Deploy` button. A metamask pop-up will appear asking you to confirm.  Confirm the transaction.  You should see a log for the deployment transaction in the ethermint daemon logs:
+
+```bash
+I[2020-07-15|17:26:43.155] Added good transaction                       module=mempool tx=877A8E6600FA27EC2B2362719274314977B243671DC4E5F8796ED97FFC0CBE42 res="&{CheckTx:log:\"[]\" gas_wanted:121193 }" height=31 total=1
+```
+
+Once the contract has been successfully deployed, you will see it show up in the `Deployed Contracts` section in the left-hand side, as well as a green check in the Remix console showing the transaction details.
+
+![deployed contract through remix](./img/remix_deployed.png)
+
+Now, you are able to interact with the contract through Remix. For `Counter.sol`, click `add`. This will open a Metamask pop-up asking you to confirm. Confirm the transaction. Then, click `getCounter` to get the count, which should be `1`.
+
+![interacting with deployed contract through remix](./img/remix_interact.png)