Feat: dockerize the project with Dockerfile and docker-compose

- Added Dockerfile for containerizing the app.
- Created docker-compose.yml for managing services.
- Updated connection strings for Docker compatibility.

bin/Debug/appsettings.json

@@ -0,0 +1,11 @@
+{
+  "Jwt": {
+    "Key": "YourSuperSecretKeyYourSuperSecretKey",
+    "Issuer": "YourIssuer",
+    "Audience": "YourAudience"
+  },
+  "AllowedHosts": "*",
+  "ConnectionStrings": {
+    "DefaultConnection": "Host=localhost;Database=SurveyBeta;Username=postgres;Password=MAJEDali645"
+  }
+}