Update ConfigCacheService, fix database race condition and fallback to file config and enable by default

.env.docker

@@ -67,7 +67,7 @@ ADMIN_DOMAIN="${APP_DOMAIN}"
 # @default "false"
 # @see https://docs.pixelfed.org/technical-documentation/config/#config_cache
 # @dottie/validate required,boolean
-ENABLE_CONFIG_CACHE="false"
+ENABLE_CONFIG_CACHE="true"
 
 # Enable/disable new local account registrations.
 #

.env.example

@@ -8,7 +8,7 @@ OPEN_REGISTRATION="false"
 ENFORCE_EMAIL_VERIFICATION="false"
 PF_MAX_USERS="1000"
 OAUTH_ENABLED="true"
-ENABLE_CONFIG_CACHE=false
+ENABLE_CONFIG_CACHE=true
 
 # Media Configuration
 PF_OPTIMIZE_IMAGES="true"

app/Services/ConfigCacheService.php

@@ -4,6 +4,7 @@ namespace App\Services;
 
 use App\Models\ConfigCache as ConfigCacheModel;
 use Cache;
+use Illuminate\Database\QueryException;
 
 class ConfigCacheService
 {
@@ -25,8 +26,8 @@ class ConfigCacheService
             return config($key);
         }
 
+        try {
             return Cache::remember($cacheKey, $ttl, function () use ($key) {
-
                 $allowed = [
                     'app.name',
                     'app.short_description',
@@ -175,6 +176,9 @@ class ConfigCacheService
 
                 return $v;
             });
+        } catch (Exception | QueryException $e) {
+            return config($key);
+        }
     }
 
     public static function put($key, $val)