adds protocol env variable and fixes prefix bug

.env-example

 DB_ROOT_PASSWORD=root
 DB_USER=user
 DB_USER_PASSWORD=user
-DOCKER_PREFIX=wptest
-MOUNT_USER=whoami
+DOCKER_PREFIX=
+MOUNT_USER=
 WP_ADMIN_PASSWORD=admin
 WP_ADMIN_USERNAME=admin
+WP_DEFAULT_PROTOCOL=https
 WP_LOCALE=fr_FR
 WP_THEME=twentyseventeen
-WP_URL=https://www.wptest.localhost
+WP_URL=
 WP_VERSION=5.4

create.sh

         --path=/var/www/html \
         --skip-email \
         --title=$DOCKER_PREFIX \
-        --url=https://$WP_URL";
+        --url=$WP_DEFAULT_PROTOCOL://$WP_URL";
 
 echo "Installing WordPress $WP_THEME theme";
 docker exec --user www-data $DOCKER_PREFIX-web /bin/sh -c "

root.sh

 source .env;
 set +o allexport
 
-docker exec -it --user root $PREFIX-web /bin/bash
+docker exec -it --user root $DOCKER_PREFIX-web /bin/bash

wp.sh

 source .env;
 set +o allexport
 
-docker exec -it --user www-data $PREFIX-web /bin/bash
+docker exec -it --user www-data $DOCKER_PREFIX-web /bin/bash