Update deployment doc node version requirement.
Update deployment doc node version requirement.

jay-z007/dxr,pelmers/dxr,kleintom/dxr,pelmers/dxr,kleintom/dxr,pelmers/dxr,jay-z007/dxr,kleintom/dxr,jbradberry/dxr,jbradberry/dxr,kleintom/dxr,jbradberry/dxr,jbradberry/dxr,jbradberry/dxr,jbradberry/dxr,jbradberry/dxr,kleintom/dxr,jay-z007/dxr,jay-z007/dxr,jay-z007/dxr,pelmers/dxr,kleintom/dxr,pelmers/dxr,pelmers/dxr,jay-z007/dxr,kleintom/dxr,jay-z007/dxr,pelmers/dxr