docs: document how to import the default config (#1392)

Signed-off-by: Xe Iaso <me@xeiaso.net>

data/common/acts-like-browser.yaml

@@ -0,0 +1,55 @@
+# Assert behaviour that only genuine browsers display. This ensures that modern Chrome
+# or Firefox versions will get through without a challenge.
+#
+# These rules have been known to be bypassed by some of the worst automated scrapers.
+# Use at your own risk.
+
+- name: realistic-browser-catchall
+  expression:
+    all:
+      - '"User-Agent" in headers'
+      - '( userAgent.contains("Firefox") ) || ( userAgent.contains("Chrome") ) || ( userAgent.contains("Safari") )'
+      - '"Accept" in headers'
+      - '"Sec-Fetch-Dest" in headers'
+      - '"Sec-Fetch-Mode" in headers'
+      - '"Sec-Fetch-Site" in headers'
+      - '"Accept-Encoding" in headers'
+      - '( headers["Accept-Encoding"].contains("zstd") || headers["Accept-Encoding"].contains("br") )'
+      - '"Accept-Language" in headers'
+  action: WEIGH
+  weight:
+    adjust: -10
+
+# The Upgrade-Insecure-Requests header is typically sent by browsers, but not always
+- name: upgrade-insecure-requests
+  expression: '"Upgrade-Insecure-Requests" in headers'
+  action: WEIGH
+  weight:
+    adjust: -2
+
+# Chrome should behave like Chrome
+- name: chrome-is-proper
+  expression:
+    all:
+      - userAgent.contains("Chrome")
+      - '"Sec-Ch-Ua" in headers'
+      - 'headers["Sec-Ch-Ua"].contains("Chromium")'
+      - '"Sec-Ch-Ua-Mobile" in headers'
+      - '"Sec-Ch-Ua-Platform" in headers'
+  action: WEIGH
+  weight:
+    adjust: -5
+
+- name: should-have-accept
+  expression: '!("Accept" in headers)'
+  action: WEIGH
+  weight:
+    adjust: 5
+
+# Generic catchall rule
+- name: generic-browser
+  user_agent_regex: >-
+    Mozilla|Opera
+  action: WEIGH
+  weight:
+    adjust: 10