Remove Matomo node_modules cleanup; tweak SolidTime

Stop removing /opt/matomo/node_modules in Matomo install/upgrade scripts (leave tests removal intact). For SolidTime, set SESSION_SECURE_COOKIE=false and APP_FORCE_HTTPS=false in the generated .env (and append them if missing) to ease non-HTTPS/local installs. Also add a warning message in the SolidTime UI JSON instructing admins to verify new accounts via: php /opt/solidtime/artisan admin:user:verify YOUR@EMAIL.

json/solidtime.json

@@ -35,6 +35,10 @@
     {
       "text": "Create your first account by registering via the web interface.",
       "type": "info"
+    },
+    {
+      "text": "After registering, verify your account via the container shell: php /opt/solidtime/artisan admin:user:verify YOUR@EMAIL",
+      "type": "warning"
     }
   ]
-}
+}