Add make target to deploy to Firebase

The configuration file has been split into 2: one for development mode
and another one for production mode.

Change-Id: I12917cd79c95642adc30004be5bc1a927bca389b
diff --git a/frontend/src/config.js b/frontend/src/config.js
new file mode 100644
index 0000000..7db9da0
--- /dev/null
+++ b/frontend/src/config.js
@@ -0,0 +1,5 @@
+import configDev from './config.dev.json5';
+import configProd from './config.json5';
+
+const config = PRODUCTION ? configProd : configDev;
+export default config;