Update guide to setup bdb+kubernetes+azure setup

-- Fixed typos in the guide
-- Fixed some syntax errors in commandline instructions
-- Fixed strucuture of sample jsons
-- Fixed bugs in nginx-https-dep file, it was trying to access
an invalid variable in the configmap.
-- Improved some docs to give more clarity for the user.
Atleast all the issues I faced. :)

k8s/nginx-https/nginx-https-dep.yaml

@@ -59,7 +59,7 @@ spec:
           valueFrom:
             configMapKeyRef:
               name: vars
-              key: openresty-backend-host
+              key: openresty-instance-name
         - name: BIGCHAINDB_BACKEND_HOST
           valueFrom:
             configMapKeyRef: