[Docs][Add] Added docs for v0.1.0 (#29)

* Added documentation for v0.1.0

Signed-off-by: iamabhishek-dubey <[email protected]>

.dockerignore

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 # Ignore build and test binaries.
 bin/
 testbin/
+docs/
+examples/

.gitignore

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 *.swp
 *.swo
 *~
+.hugo_build.lock

CHANGELOG.md

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+### v0.1.0
+##### Feburary 5, 2022
+
+#### :tada: Features
+
+- Added standalone MongoDB functionality
+- Added cluster MongoDB functionality
+- Helm chart installation support
+- Monitoring support for MongoDB
+- Documentation for setup and management
+

docs/content/en/docs/Development/_index.md

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+---
+title: "Development"
+linkTitle: "Development"
+weight: 5
+description: >
+    Development related information for MongoDB Operator
+---

docs/content/en/docs/Development/dev-guide.md

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+---
+title: "Development Guide"
+weight: 2
+linkTitle: "Development Guide"
+description: >
+   Development guide for MongoDB Operator
+---
+
+## Pre-requisites
+
+**Access to Kubernetes cluster**
+
+First, you will need access to a Kubernetes cluster. The easiest way to start is minikube.
+
+- [Virtualbox](https://www.virtualbox.org/wiki/Downloads)
+- [Minikube](https://kubernetes.io/docs/setup/minikube/)
+- [Kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+
+**Tools to build an Operator**
+
+Apart from kubernetes cluster, there are some tools which are needed to build and test the MongoDB Operator.
+
+- [Git](https://git-scm.com/downloads)
+- [Go](https://golang.org/dl/)
+- [Docker](https://docs.docker.com/install/)
+- [Operator SDK](https://github.com/operator-framework/operator-sdk/blob/v0.8.1/doc/user/install-operator-sdk.md)
+- [Make](https://www.gnu.org/software/make/manual/make.html)
+
+## Building Operator
+
+To build the operator on local system, we can use `make` command.
+
+```shell
+$ make manager
+...
+go build -o bin/manager main.go
+```
+
+MongoDB operator gets packaged as a container image for running on the Kubernetes cluster.
+
+```shell
+$ make docker-build
+```
+
+If you want to play it on Kubernetes. You can use a minikube.
+
+```shell
+$ minikube start --vm-driver virtualbox
+...
+😄  minikube v1.0.1 on linux (amd64)
+🤹  Downloading Kubernetes v1.14.1 images in the background ...
+🔥  Creating kvm2 VM (CPUs=2, Memory=2048MB, Disk=20000MB) ...
+📶  "minikube" IP address is 192.168.39.240
+🐳  Configuring Docker as the container runtime ...
+🐳  Version of container runtime is 18.06.3-ce
+⌛  Waiting for image downloads to complete ...
+✨  Preparing Kubernetes environment ...
+🚜  Pulling images required by Kubernetes v1.14.1 ...
+🚀  Launching Kubernetes v1.14.1 using kubeadm ... 
+⌛  Waiting for pods: apiserver proxy etcd scheduler controller dns
+🔑  Configuring cluster permissions ...
+🤔  Verifying component health .....
+💗  kubectl is now configured to use "minikube"
+🏄  Done! Thank you for using minikube!
+```
+
+```shell
+$ make test
+```

docs/content/en/docs/Monitoring/_index.md

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+---
+title: "Monitoring"
+linkTitle: "Monitoring"
+weight: 4
+description: >
+    Monitoring of MongoDB standalone and cluster
+---

docs/content/en/docs/Monitoring/grafana-dashboard.md

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+---
+title: "Grafana Dashboard"
+weight: 3
+linkTitle: "Grafana Dashboard"
+description: >
+    Monitoring dashboard of MongoDB database for Grafana
+---
+
+### Coming Soon

docs/content/en/docs/Monitoring/prometheus-monitoring.md

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+---
+title: "Prometheus Monitoring"
+weight: 2
+linkTitle: "Prometheus Monitoring"
+description: >
+    Monitoring of MongoDB standalone and replicaset cluster using Prometheus
+---
+
+In MongoDB Operator, we are using [mongodb-exporter](https://github.com/percona/mongodb_exporter) to collect the stats, metrics for MongoDB database. This exporter is capable to capture the stats for standalone and cluster mode of MongoDB.
+
+If we are using the `helm` chart for installation purpose, we can simply enable this configuration inside the [values.yaml](https://github.com/OT-CONTAINER-KIT/helm-charts/blob/main/charts/mongodb-cluster/values.yaml). 
+
+```yaml
+mongoDBMonitoring:
+  enabled: true
+  image:
+    name: bitnami/mongodb-exporter
+    tag: 0.11.2-debian-10-r382
+    imagePullPolicy: IfNotPresent
+  resources: {}
+```
+
+In case of `kubectl` installation, we can add a code snippet in yaml manifest like this:-
+
+```yaml
+  mongoDBMonitoring:
+    enableExporter: true
+    image: bitnami/mongodb-exporter:0.11.2-debian-10-r382
+    imagePullPolicy: IfNotPresent
+    resources: {}
+```
+
+## ServiceMonitor for Prometheus Operator
+
+Once the exporter is configured, the next aligned task would be to ask [Prometheus](https://prometheus.io) to monitor it. For [Prometheus Operator](https://github.com/prometheus-operator/prometheus-operator), we have to create CRD object in Kubernetes called "ServiceMonitor". We can update this using the `helm` as well.
+
+```yaml
+serviceMonitor:
+  enabled: false
+  interval: 30s
+  scrapeTimeout: 10s
+  namespace: monitoring
+```
+
+For kubectl related configuration, we may have to create `ServiceMonitor` definition in a yaml file and apply it using kubectl command. A `ServiceMonitor` definition looks like this:-
+
+```yaml
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: mongodb-prometheus-monitoring
+  labels:
+    app.kubernetes.io/name: mongodb
+    app.kubernetes.io/managed-by: mongodb
+    app.kubernetes.io/instance: mongodb
+    app.kubernetes.io/version: v0.1.0
+    app.kubernetes.io/component: middleware
+spec:
+  selector:
+    matchLabels:
+      app: mongodb
+      mongodb_setup: standalone
+      role: standalone
+  endpoints:
+  - port: metrics
+    interval: 30s
+    scrapeTimeout: 30s
+  namespaceSelector:
+    matchNames:
+      - middleware-production
+```
+
+

docs/content/en/docs/Release History/_index.md

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+---
+title: "Release History"
+linkTitle: "Release History"
+weight: 6
+description: >
+    Release information for MongoDB Operator
+---

docs/content/en/docs/Release History/changelog.md

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+---
+title: "CHANGELOG"
+weight: 2
+linkTitle: "CHANGELOG"
+description: >
+    Changelog version history for MongoDB
+---
+
+### v0.1.0
+
+**Feburary 5, 2022**
+
+**🏄 Features**
+
+- Added standalone MongoDB functionality
+- Added cluster MongoDB functionality
+- Helm chart installation support
+- Monitoring support for MongoDB
+- Documentation for setup and management