add better error handling to entrypoint script

CHANGELOG.md

@@ -1,2 +1,5 @@
+* ENHANCEMENT
+  * better error handling in entrypoint script
+
 * BUGFIX
-  * move healthcheck to wrapper script
+  * symling `/etc/ssl/certs/ca-certificates.crt` to freshrss root as workaround for [#2549](https://github.com/FreshRSS/FreshRSS/issues/2549)

overlay/usr/local/bin/entrypoint.sh

@@ -1,13 +1,42 @@
 #!/bin/sh
+
 /usr/local/bin/gomplate -V -o /etc/php7/php.ini -f /etc/templates/php.ini.tmpl
 /usr/local/bin/gomplate -V -o /var/www/app/data/config.php -f /etc/templates/config.php.tmpl
 /usr/local/bin/gomplate -V -o /var/www/app/constants.local.php -f /etc/templates/constants.local.php.tmpl
 
-/usr/bin/php -f ./cli/prepare.php
+printf "\nPrepare FreshRSS...\n"
+PREP=$(/usr/bin/phpp -f ./cli/prepare.php)
+if [ $? -ne 0 ]; then
+    echo $PREP
+    exit 1
+fi
 
 if [ "${FRESHRSS_DEFAULT_USER}" ]; then
-    /usr/bin/php ./cli/create-user.php --user "$FRESHRSS_DEFAULT_USER" --password "$FRESHRSS_DEFAULT_PASSWORD"
+    printf "\nEnsure default user exists...\n"
-    /usr/bin/php ./cli/do-install.php --default_user "$FRESHRSS_DEFAULT_USER"
+    UCREATE=$(/usr/bin/php ./cli/create-user.php --user "$FRESHRSS_DEFAULT_USER" --password "$FRESHRSS_DEFAULT_PASSWORD" 2>&1)
+    if [ $? -ne 0 ]; then
+        case "$UCREATE" in
+          *"username already taken"*) echo "Result: success" ;;
+          *)
+          echo $UCREATE
+          exit 1
+          ;;
+        esac
+    fi 
+
+    printf "\nEnsure FreshRSS is installed...\n"
+    INSTALL=$(/usr/bin/php ./cli/do-install.php --default_user "$FRESHRSS_DEFAULT_USER" 2>&1)
+    if [ $? -ne 0 ]; then
+        case "$INSTALL" in
+          *"already installed"*) 
+          /usr/bin/php ./cli/reconfigure.php --default_user "$FRESHRSS_DEFAULT_USER"
+          ;;
+          *)
+          echo $INSTALL
+          exit 1
+          ;;
+        esac
+    fi
 fi
 
 exec supercronic -split-logs /etc/crontabs/nginx 1> /dev/null &