Remove Installation instructions from README (#167)

Since we already have all installation instructions at botkube.io we can just point to already existing installation instructions.

README.md

@@ -10,114 +10,6 @@ You can also ask BotKube to execute kubectl commands on k8s cluster which helps
 
 ## Getting started
 Please follow [this](https://www.botkube.io/installation/) for complete BotKube installation guide.
-### Install BotKube app to your Slack workspace
-Click the "Add to Slack" button provided to install `BotKube` Slack application to your workspace. Once you authorized the application, you will be provided a BOT Access token. Kindly note down that token which will be required while deploying BotKube controller to your cluster
-
-<a href="https://slack.com/oauth/authorize?scope=commands,bot&client_id=12637824912.515475697794"><img alt="Add to Slack" height="40" width="139" src="https://platform.slack-edge.com/img/add_to_slack.png" srcset="https://platform.slack-edge.com/img/add_to_slack.png 1x, https://platform.slack-edge.com/img/add_to_slack@2x.png 2x" /></a>
-
-### Add BotKube to a Slack channel
-After installing BotKube app to your Slack workspace, you could see new bot user with name 'BotKube' create in your workspace. Add that bot to a Slack channel you want to receive notification in. (You can add it by inviting using `@BotKube` message in a required channel)
-
-### Installing BotKube controller to your Kubernetes cluster
-
-#### Using helm
-
-- We will be using [helm](https://helm.sh/) to install our k8s controller. Follow [this](https://docs.helm.sh/using_helm/#installing-helm) guide to install helm if you don't have it installed already
-- Clone the BotKube github repository.
-```bash
-$ git clone https://github.com/infracloudio/botkube.git
-```
-
-- Update default **config** in **helm/botkube/values.yaml** to watch the resources you want. (by default you will receive **create**, **delete** and **error** events for all the resources in all the namespaces.)
-If you are not interested in events about particular resource, just remove it's entry from the config file.
-- Deploy BotKube controller using **helm install** in your cluster.
-```bash
-$ helm install --name botkube --namespace botkube \
---set config.communications.slack.enabled=true \
---set config.communications.slack.channel={SLACK_CHANNEL_NAME} \
---set config.communications.slack.token={SLACK_API_TOKEN_FOR_THE_BOT} \
---set config.settings.clustername={CLUSTER_NAME} \
---set config.settings.allowkubectl={ALLOW_KUBECTL} \
-helm/botkube
-```
-
-  where,<br>
-  **SLACK_CHANNEL_NAME** is the channel name where @BotKube is added<br>
-  **SLACK_API_TOKEN_FOR_THE_BOT** is the Token you received after installing BotKube app to your Slack workspace<br>
-  **CLUSTER_NAME** is the cluster name set in the incoming messages<br>
-  **ALLOW_KUBECTL** set true to allow kubectl command execution by BotKube on the cluster<br>
-
-  Configuration syntax is explained [here](https://www.botkube.io/configuration) 
-
-- Send **@BotKube ping** in the channel to see if BotKube is running and responding.
-
-#### Using kubectl
-
-- Make sure that you have kubectl cli installed and have access to Kubernetes cluster
-- Download deployment specs yaml
-
-```bash
-$ wget -q https://raw.githubusercontent.com/infracloudio/botkube/master/deploy-all-in-one.yaml
-```
-
-- Open downloaded **deploy-all-in-one.yaml** and update the configuration.
-  Set *SLACK_CHANNEL*, *SLACK_API_TOKEN*, *clustername*, *allowkubectl* and update the resource events configuration you want to receive notifications for in the configmap.
-
-  where,<br>
-  **SLACK_CHANNEL** is the channel name where @BotKube is added<br>
-  **SLACK_API_TOKEN** is the Token you received after installing BotKube app to your Slack workspace<br>
-  **clustername** is the cluster name set in the incoming messages<br>
-  **allowkubectl** set true to allow kubectl command execution by BotKube on the cluster<br>
-
-  Configuration syntax is explained [here](https://www.botkube.io/configuration) 
-
-- Create **botkube** namespace and deploy resources
-
-```bash
-$ kubectl create ns botkube && kubectl create -f deploy-all-in-one.yaml -n botkube
-```
-
-- Check pod status in botkube namespace. Once running, send **@BotKube ping** in the Slack channel to confirm if BotKube is responding correctly.
-
-- To deploy with TLS, download and use deploy-all-in-one-tls.yaml. Replace **ENCODED_CERTIFICATE** with your base64 encoded certificate value in the secret. To get a base64 encoded value of your certificate, use below command and replace <YOUR_CERTIFICATE> with the certificate name.
-
-```bash
-$ cat <YOUR_CERTIFICATE> | base64 -w 0
-```
-
-## Add BotKube to your Mattermost team
-Before adding `BotKube` to your Mattermost team, please make sure you have all the pre-requisites working.
-
-### Pre-requisites
-**Step 1**: Login with System Admin account, and in the Menu proceed to System console -> Integrations -> Custom Integrations and enable `Personal Access Token`.<br><br>
-**Step 2**: To create a Botkube user, if not already created, proceed to menu and Get team invite link. Logout from admin account and paste the link in the address bar and create a user with the username `BotKube`.<br><br>
-**Step 3**: To create a Botkube alerts channel, if not already created, click on `Create new channel` and fill the details of the channel. Add BotKube user to the Channel and use the same Channel name in the configuration parameters for Botkube.<br><br>
-**Step 4**: Login as System Admin and in the Menu proceed to System console -> Users. For `BotKube` user, Manage Roles and allow tokens and post_all access.<br><br>
-**Step 5**: Login as BotKube user, in the Menu proceed to Account Settings -> Security -> Personal Access Token -> Create and save the token.
-
-### Configurations
-In the helm chart, config.yaml or deploy-all-in-one.yaml update the following fields for enabling Mattermost support and providing Mattermost config parameters.
-
-**MATTERMOST_SERVER_URL** is the URL where Mattermost is running<br>
-**MATTERMOST_CERT** is the SSL certificate file for HTTPS connection. Place it in Helm directory and specify the path<br>
-**MATTERMOST_TOKEN** is the Token you received after installing BotKube user and creating Personal Access Token<br>
-**MATTERMOST_TEAM** is the team name where BotKube will be added<br>
-**MATTERMOST_CHANNEL** is the channel name where BotKube will be added<br>
-
-#### Using helm
-
-```bash
-$ helm install --name botkube --namespace botkube \
---set config.communications.mattermost.enabled=true \
---set config.communications.mattermost.url={MATTERMOST_SERVER_URL} \
---set config.communications.mattermost.cert={MATTERMOST_CERT} \
---set config.communications.mattermost.token={MATTERMOST_TOKEN} \
---set config.communications.mattermost.team={MATTERMOST_TEAM} \
---set config.communications.mattermost.channel={MATTERMOST_CHANNEL} \
---set config.settings.clustername={CLUSTER_NAME} \
---set config.settings.allowkubectl={ALLOW_KUBECTL} \
-helm/botkube
-```
 
 ## Architecture
 ![](/botkube_arch.jpg)