update terraform-provider-build doc for IBM Power

Fixes: #37
Signed-off-by: Prajyot Parab <prajyot.parab@ibm.com>

docs/terraform-provider-build.md

@@ -19,13 +19,47 @@ Download Terraform for IBM Power Systems from https://www.power-devops.com/terra
 Install latest go from https://golang.org/dl/ and set your GOPATH
 
 ```
-go get -u github.com/dmacvicar/terraform-provider-libvirt
-go get -u github.com/terraform-providers/terraform-provider-random
-go get -u github.com/terraform-providers/terraform-provider-ignition
-go get -u github.com/terraform-providers/terraform-provider-null
-cd $GOPATH/bin/ ; mkdir -p ~/.terraform.d/plugins/; 
-cp * ~/.terraform.d/plugins/
+mkdir -p ~/.terraform.d/plugins/
+```
+
+**terraform-provider-libvirt**: Please refer to the section below for instructions on installing the libvirt provider plugin. For [more information](https://github.com/dmacvicar/terraform-provider-libvirt#building-from-source).
+```
+git clone https://github.com/dmacvicar/terraform-provider-libvirt $GOPATH/src/github.com/dmacvicar/terraform-provider-libvirt
+cd $GOPATH/src/github.com/dmacvicar/terraform-provider-libvirt
+make install
+cp $GOPATH/bin/terraform-provider-libvirt ~/.terraform.d/plugins/terraform-provider-libvirt
+```
+
+**terraform-provider-random >=2.3, <3.0**: Please refer to the section below for instructions on installing the random provider plugin. For [more information](https://github.com/hashicorp/terraform-provider-random#building-the-provider).
+```
+git clone --branch <TAG> https://github.com/terraform-providers/terraform-provider-random $GOPATH/src/github.com/terraform-providers/terraform-provider-random
+cd $GOPATH/src/github.com/terraform-providers/terraform-provider-random
+make build
+cp $GOPATH/bin/terraform-provider-random ~/.terraform.d/plugins/terraform-provider-random_<TAG>
+
+Note: Set <TAG> to compatible version eg. v2.3.0
+```
+
+**terraform-provider-ignition >=1.2, <2.0**: Please refer to the section below for instructions on installing the ignition provider plugin. For [more information](https://github.com/terraform-providers/terraform-provider-ignition#building-the-provider).
+```
+git clone --branch <TAG> https://github.com/terraform-providers/terraform-provider-ignition $GOPATH/src/github.com/terraform-providers/terraform-provider-ignition
+cd $GOPATH/src/github.com/terraform-providers/terraform-provider-ignition
+make build
+cp $GOPATH/bin/terraform-provider-ignition ~/.terraform.d/plugins/terraform-provider-ignition_<TAG>
+
+Note: Set <TAG> to compatible version eg. v1.2.1
+```
+
+**terraform-provider-null >=2.1, <3.0**: Please refer to the section below for instructions on installing the null provider plugin. For [more information](https://github.com/hashicorp/terraform-provider-null#building-the-provider).
+```
+git clone --branch <TAG> https://github.com/terraform-providers/terraform-provider-null $GOPATH/src/github.com/terraform-providers/terraform-provider-null
+cd $GOPATH/src/github.com/terraform-providers/terraform-provider-null
+make build
+cp $GOPATH/bin/terraform-provider-null ~/.terraform.d/plugins/terraform-provider-null_<TAG>
+
+Note: Set <TAG> to compatible version eg. v2.1.2
 ```
 
 Upon successful completion. Please follow the instructions outlined here
 https://github.com/ocp-power-automation/ocp4-upi-kvm/blob/master/docs/quickstart.md#start-install
+