add example config dir, logos, and update CONTRIBUTING.md

config/config.example.yml

@@ -0,0 +1,38 @@
+app:
+    base_url: http://localhost
+    log_level: debug
+    save_logs: false
+
+server:
+    external_port: 3000
+    internal_port: 3001
+    next_port: 3002
+    internal_hostname: localhost
+    secure_cookies: false
+    session_cookie_name: p_session
+    resource_session_cookie_name: p_resource_session
+
+traefik:
+    cert_resolver: letsencrypt
+    http_entrypoint: web
+    https_entrypoint: websecure
+
+gerbil:
+    start_port: 51820
+    base_endpoint: localhost
+    block_size: 16
+    subnet_group: 10.0.0.0/8
+    use_subdomain: true
+
+rate_limits:
+    global:
+        window_minutes: 1
+        max_requests: 100
+
+users:
+    server_admin:
+        email: admin@example.com
+        password: Password123!
+
+flags:
+    require_email_verification: false