lint: add markdown linter (#5254)

docs/networks/docker-compose.md

@@ -61,7 +61,7 @@ the binary and config files to the container.
 
 To change the number of validators / non-validators change the `localnet-start` Makefile target [here](../../makefile):
 
-```sh
+```makefile
 localnet-start: localnet-stop
   @if ! [ -f build/node0/config/genesis.json ]; then docker run --rm -v $(CURDIR)/build:/tendermint:Z tendermint/localnode testnet --v 5 --n 3 --o . --populate-persistent-peers --starting-ip-address 192.167.10.2 ; fi
   docker-compose up

docs/networks/terraform-and-ansible.md

@@ -28,7 +28,7 @@ node testnet. The script more or less does everything described below.
 - Create SSH keys (`ssh-keygen`)
 - Set environment variables:
 
-```
+```sh
 export DO_API_TOKEN="abcdef01234567890abcdef01234567890"
 export SSH_KEY_FILE="$HOME/.ssh/id_rsa.pub"
 ```
@@ -40,13 +40,13 @@ These will be used by both `terraform` and `ansible`.
 This step will create four Digital Ocean droplets. First, go to the
 correct directory:
 
-```
+```sh
 cd $GOPATH/src/github.com/tendermint/tendermint/networks/remote/terraform
 ```
 
 then:
 
-```
+```sh
 terraform init
 terraform apply -var DO_API_TOKEN="$DO_API_TOKEN" -var SSH_KEY_FILE="$SSH_KEY_FILE"
 ```
@@ -72,13 +72,13 @@ number of droplets created).
 
 To create the node files run:
 
-```
+```sh
 tendermint testnet
 ```
 
 Then, to configure our droplets run:
 
-```
+```sh
 ansible-playbook -i inventory/digital_ocean.py -l sentrynet config.yml -e BINARY=$GOPATH/src/github.com/tendermint/tendermint/build/tendermint -e CONFIGDIR=$GOPATH/src/github.com/tendermint/tendermint/networks/remote/ansible/mytestnet
 ```
 
@@ -87,7 +87,7 @@ configuration files to run a testnet.
 
 Next, we run the install role:
 
-```
+```sh
 ansible-playbook -i inventory/digital_ocean.py -l sentrynet install.yml
 ```
 
@@ -104,14 +104,14 @@ increasing).
 Next, open `roles/install/templates/systemd.service.j2` and look for the
 line `ExecStart` which should look something like:
 
-```
+```sh
 ExecStart=/usr/bin/tendermint node --proxy_app=kvstore
 ```
 
 and add the `--p2p.persistent_peers` flag with the relevant information
 for each node. The resulting file should look something like:
 
-```
+```sh
 [Unit]
 Description={{service}}
 Requires=network-online.target
@@ -132,13 +132,13 @@ WantedBy=multi-user.target
 
 Then, stop the nodes:
 
-```
+```sh
 ansible-playbook -i inventory/digital_ocean.py -l sentrynet stop.yml
 ```
 
 Finally, we run the install role again:
 
-```
+```sh
 ansible-playbook -i inventory/digital_ocean.py -l sentrynet install.yml
 ```
 
@@ -148,7 +148,7 @@ increasing. Your testnet is now up and running :)
 
 Peek at the logs with the status role:
 
-```
+```sh
 ansible-playbook -i inventory/digital_ocean.py -l sentrynet status.yml
 ```
 
@@ -160,7 +160,7 @@ service provider. You can set up your nodes to log there automatically.
 Create an account and get your API key from the notes on [this
 page](https://app.logz.io/#/dashboard/data-sources/Filebeat), then:
 
-```
+```sh
 yum install systemd-devel || echo "This will only work on RHEL-based systems."
 apt-get install libsystemd-dev || echo "This will only work on Debian-based systems."
 
@@ -172,6 +172,6 @@ ansible-playbook -i inventory/digital_ocean.py -l sentrynet logzio.yml -e LOGZIO
 
 To remove your droplets, run:
 
-```
+```sh
 terraform destroy -var DO_API_TOKEN="$DO_API_TOKEN" -var SSH_KEY_FILE="$SSH_KEY_FILE"
 ```