fix(install_site): 1 cert per URL

_nginx/install_site/entrypoint.sh

@@ -1,21 +1,15 @@
 #!/bin/bash -e
 
-CERTBOTCMD=(
+for URL in $BASE_URL $OTHER_URLS; do
     certbot certonly -n
         --webroot
         -w /var/www/certbot/
         --agree-tos
         --no-eff-email
         -m "$EMAIL"
-    -d "$BASE_URL"
-)
-
-for URL in $OTHER_URLS; do
-    CERTBOTCMD+=(-d "$URL")
+        -d "$URL"
 done
 
-"${CERTBOTCMD[@]}"
-
 for f in *; do
     envsubst "$(env | xargs printf '$%s ')" < "$f" > "/sites/$f"
 done