Add webpack config for env specific builds

Add documentation and example files to make environment specific
build modifications.

- Store any env specific router and store modules in
  separate env directory

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I06ff3cb0928707354266dd25b399710847e7fa18
diff --git a/.env.openpower b/.env.openpower
new file mode 100644
index 0000000..26c1c98
--- /dev/null
+++ b/.env.openpower
@@ -0,0 +1,2 @@
+NODE_ENV=production
+VUE_APP_ENV_NAME=openpower
\ No newline at end of file