chore(contribute-guide): updated the contribute guidelines (#375)

Signed-off-by: shubhamchaudhary <shubham.chaudhary@mayadata.io>

CONTRIBUTING.md

@@ -6,5 +6,39 @@ contributions. This repository is the canonical source for the chaos charts that
 Chaos Charts are a groups of categorized chaos experiments, represented as custom resource definitions that can be executed by the 
 [Litmus Chaos Operator](https://github.com/litmuschaos/chaos-operator). We would love to see your charts added to the list of community-charts. 
 
-To get started, refer the [developer guide](https://github.com/litmuschaos/litmus-go/tree/master/contribute/developer-guide)
+## Categories In Charts
 
+- <b>Generic</b>: It contains chaos to disrupt state of kubernetes resources. i.e, pod-delete
+- <b>OpenEBS</b>: It contains chaos to disrupt state of OpenEBS control/date plane components. i.e, openebs-target-failure
+- <b>Cassandra</b>: It contains chaos to disrupt state of Cassandra Applications. i.e, cassandra-pod-delete
+- <b>Kafka</b>: It contains chaos to disrupt state of Kafka Applications. i.e, kafka-broker-pod-delete
+- <b>Coredns</b>: It contains chaos to disrupt state of Coredns pod. i.e, coredns-pod-delete
+- <b>Kube-AWS</b>: It contains chaos to disrupt state of AWS resources running part of the kubernetes cluster. i.e, ebs-loss
+- <b>Kube-Components</b>: It contains chaos to disrupt the state of kubernetes components. i.e, k8-kube-proxy.
+
+## Components/Files Of A Category
+- <b>experiments.yaml</b>: It contains combined/concatenated experiments CRs present inside that category.
+- <b><</b><b>category</b><b>>-chartserviceversion.yaml</b>: It contains all the metadata of the category, which is rendered in ChaosHub.
+- <b><</b><b>category</b><b>>.package.yaml</b>: It contains list of all experiments present in that category.
+- <b>icons</b>: `icons` directory contains category icon and icons of all experiments present inside that category. The name of the icon file should follow this `<exp-name>.png` convention.
+
+## Components/Files Of A Experiment
+- <b>engine.yaml</b>: It contains ChaosEngine CR manifest of the experiment.
+- <b>experiment.yaml</b>: It contains ChaosExperiment CR manifest of the experiment.
+- <b>rbac.yaml</b>: It contains RBAC(serviceAccount, Role/ClusterRole, RoleBinding/ClusterRoleBinding) manifest of the experiment.
+- <b><</b><b>exp-name</b><b>>-chartserviceversion.yaml</b>: It contains all the metadata of the experiment, which is rendered in ChaosHub.
+
+
+## Raising PR For New Experiment
+
+- It should contains all the required file for experiment(engine.yaml, experiment.yaml, rbac.yaml, <exp-name>-chartserviceversion.yaml). For more details [refer](https://github.com/litmuschaos/chaos-charts/blob/master/CONTRIBUTING.md#componentsfiles-of-a-experiment).
+
+- If the experiment belongs to an existing category then add an entry for the experiment in `<category.package.yaml>` and `<category.chartserviceversion.yaml>`. Add the icon for the experiment in `<category/icons>` directory. The name of the icon should be `<exp-name.png>`.
+
+- If the experiment belongs to a new category then Create all the required files for the category and add the entries. For more details [refer](https://github.com/litmuschaos/chaos-charts/blob/master/CONTRIBUTING.md#componentsfiles-of-a-category)
+
+
+<strong>Notes:</strong> The name of directories/files should follow the same naming convention prescribed above for [experiment](https://github.com/litmuschaos/chaos-charts/blob/master/CONTRIBUTING.md#componentsfiles-of-a-experiment) and [category](https://github.com/litmuschaos/chaos-charts/blob/master/CONTRIBUTING.md#componentsfiles-of-a-category).
+
+
+To get started, refer to the [developer guide](https://github.com/litmuschaos/litmus-go/tree/master/contribute/developer-guide)