Add Altcha hmac key to settings

Workaround for: aboutcode-org/django-altcha#15

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

vulnerablecode/settings.py

@@ -38,6 +38,10 @@
 
 CSRF_TRUSTED_ORIGINS = env.list("CSRF_TRUSTED_ORIGINS", default=[])
 
+# Altcha 32-byte hexadecimal key
+
+ALTCHA_HMAC_KEY = env.str("ALTCHA_HMAC_KEY")
+
 # SECURITY WARNING: do not run with debug turned on in production
 DEBUG = env.bool("VULNERABLECODE_DEBUG", default=False)