Add README for homepage update

homepage/README.md

@@ -0,0 +1,13 @@
+# Homepage in frontal_app
+
+## Install
+
+    cd homepage
+    ln -s $PWD/nginx.conf /etc/nginx/sites-enabled/frontal
+    docker-compose up -d
+
+## Update
+
+    cd homepage
+    docker-compose build --no-cache
+    docker-compose up -d