diff --git a/DeepDrftContent/FileDatabase/Models/IndexData.cs b/DeepDrftContent/FileDatabase/Models/IndexData.cs
index c5f0fe4..1b79047 100644
--- a/DeepDrftContent/FileDatabase/Models/IndexData.cs
+++ b/DeepDrftContent/FileDatabase/Models/IndexData.cs
@@ -34,12 +34,21 @@ public class DirectoryIndexData : IndexData
     }
 }
 
+/// <summary>
+/// Entry data for vault index serialization
+/// </summary>
+public class VaultEntryData
+{
+    public EntryKey Key { get; set; } = null!;
+    public MetaData Value { get; set; } = null!;
+}
+
 /// <summary>
 /// Serializable data for vault indexes
 /// </summary>
 public class VaultIndexData : IndexData
 {
-    public List<(EntryKey Key, MetaData Value)> Entries { get; set; } = new();
+    public List<VaultEntryData> Entries { get; set; } = new();
 
     public VaultIndexData(string indexKey) : base(indexKey) { }
 
@@ -47,7 +56,7 @@ public class VaultIndexData : IndexData
     {
         var data = new VaultIndexData(index.GetKey())
         {
-            Entries = index.Entries.Select(kvp => (kvp.Key, kvp.Value)).ToList()
+            Entries = index.Entries.Select(kvp => new VaultEntryData { Key = kvp.Key, Value = kvp.Value }).ToList()
         };
         return data;
     }
@@ -92,9 +101,9 @@ public class VaultIndex : IndexData, IIndex
     {
         Entries = new StructuralMap<EntryKey, MetaData>();
         // Load entries from data
-        foreach (var (key, value) in indexData.Entries)
+        foreach (var entry in indexData.Entries)
         {
-            Entries.Set(key, value);
+            Entries.Set(entry.Key, entry.Value);
         }
     }
 
diff --git a/DeepDrftContent/FileDatabase/Models/MediaModels.cs b/DeepDrftContent/FileDatabase/Models/MediaModels.cs
index a54d278..ebaaee3 100644
--- a/DeepDrftContent/FileDatabase/Models/MediaModels.cs
+++ b/DeepDrftContent/FileDatabase/Models/MediaModels.cs
@@ -156,8 +156,15 @@ public static class MimeTypeExtensions
         { ".bmp", "image/bmp" }
     };
 
-    private static readonly Dictionary<string, string> Extensions = 
-        MimeTypes.ToDictionary(kvp => kvp.Value, kvp => kvp.Key);
+    private static readonly Dictionary<string, string> Extensions = new()
+    {
+        { "image/jpeg", ".jpg" },
+        { "image/png", ".png" },
+        { "image/gif", ".gif" },
+        { "image/webp", ".webp" },
+        { "image/svg+xml", ".svg" },
+        { "image/bmp", ".bmp" }
+    };
 
     public static string GetMimeType(string extension)
     {
diff --git a/DeepDrftContent/FileDatabase/Models/MetaData.cs b/DeepDrftContent/FileDatabase/Models/MetaData.cs
index 12d84d5..be1f7e0 100644
--- a/DeepDrftContent/FileDatabase/Models/MetaData.cs
+++ b/DeepDrftContent/FileDatabase/Models/MetaData.cs
@@ -1,3 +1,5 @@
+using System.Text.Json.Serialization;
+
 namespace DeepDrftContent.FileDatabase.Models;
 
 /// <summary>
@@ -5,6 +7,9 @@ namespace DeepDrftContent.FileDatabase.Models;
 /// </summary>
 /// <param name="MediaKey">The key used to identify the media file</param>
 /// <param name="Extension">The file extension of the media</param>
+[JsonPolymorphic(TypeDiscriminatorPropertyName = "$type")]
+[JsonDerivedType(typeof(MetaData), typeDiscriminator: "media")]
+[JsonDerivedType(typeof(ImageMetaData), typeDiscriminator: "image")]
 public record MetaData(string MediaKey, string Extension);
 
 /// <summary>
diff --git a/DeepDrftContent/Models/FileDatabaseSettings.cs b/DeepDrftContent/Models/FileDatabaseSettings.cs
new file mode 100644
index 0000000..6932951
--- /dev/null
+++ b/DeepDrftContent/Models/FileDatabaseSettings.cs
@@ -0,0 +1,7 @@
+namespace DeepDrftContent.Models
+{
+    public class FileDatabaseSettings
+    {
+        public required string VaultPath { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/DeepDrftContent/Startup.cs b/DeepDrftContent/Startup.cs
new file mode 100644
index 0000000..2635f11
--- /dev/null
+++ b/DeepDrftContent/Startup.cs
@@ -0,0 +1,18 @@
+using DeepDrftContent.Models;
+
+namespace DeepDrftContent
+{
+    public static class Startup
+    {
+        public static void ConfigureDomainServices(WebApplicationBuilder builder)
+        {
+            // File Database
+            builder.Configuration.AddJsonFile("environment/filedatabase.json", optional: false, reloadOnChange: true);
+            var fileDatabaseSettings = builder.Configuration.GetSection(nameof(FileDatabaseSettings)).Get<FileDatabaseSettings>();
+            if (fileDatabaseSettings is null) { throw new Exception("File database settings are not configured"); }
+            builder.Services.AddSingleton(
+                    FileDatabase.Services.FileDatabase.FromAsync(
+                        fileDatabaseSettings.VaultPath));
+        }
+    }
+}
\ No newline at end of file