added public folder to caddy

caddy/Caddyfile

@@ -1,5 +1,5 @@
 https://exchange-staging.izyim.com {
-    root /var/www/public
+    root /app/public
     fastcgi / 127.0.0.1:8000 php {
         index index.php
     }

caddy/Dockerfile

@@ -10,8 +10,9 @@ RUN curl --silent --show-error --fail --location \
     && /usr/bin/caddy -version \
     && docker-php-ext-install mbstring pdo pdo_mysql
 
+ADD . /var/www
 COPY Caddyfile /etc/Caddyfile
 
-WORKDIR /var/www/public
+WORKDIR /var/www
 
 CMD ["/usr/bin/caddy", "--conf", "/etc/Caddyfile", "--log", "stdout"]