Update README.md

Author: IvanMurzak

Assets/_PackageRoot/README.md

@@ -45,6 +45,39 @@ SQLitePCLRaw.Startup.Setup();
 openupm add extensions.unity.bundle.efcore.sqlite
 ```
 
+## Manual Installation (alternative)
+
+Modify `/Packages/manifest.json` file by adding requierd `depedencies` and `scopedRegistries`
+```
+{
+  "dependencies": {
+    "extensions.unity.bundle.efcore.sqlite": "0.0.4",
+    "org.nuget.castle.core": "5.1.1",
+    "org.nuget.sqlitepclraw.bundle_e_sqlite3": "2.1.10",
+    "org.nuget.sqlitepclraw.provider.e_sqlite3": "2.1.10",
+    "org.nuget.sqlitepclraw.provider.sqlite3": "2.1.10",
+    "org.nuget.sqlitepclraw.lib.e_sqlite3": "2.1.10"
+  },
+  "scopedRegistries": [
+    {
+      "name": "package.openupm.com",
+      "url": "https://package.openupm.com",
+      "scopes": [
+        "com.openupm",
+        "extensions.unity.bundle.efcore.sqlite"
+      ]
+    },
+    {
+      "name": "unitynuget-registry.azurewebsites.net",
+      "url": "https://unitynuget-registry.azurewebsites.net",
+      "scopes": [
+        "org.nuget"
+      ]
+    }
+  ]
+}
+```
+
 # Alternative usage
 
 ## 1. Create `SQLiteContext` class