Added several vars that are already implemented to the .env.production.sample file.
-Max bio character limit
-Number of profile fields allowed
-Max display name character limit
# Maximum number of pinned posts
# MAX_PINNED_TOOTS=5
+# Maximum allowed bio characters
+# MAX_BIO_CHARS=500
+
+# Maximim number of profile fields allowed
+# MAX_PROFILE_FIELDS=4
+
+# Maximum allowed display name characters
+# MAX_DISPLAY_NAME_CHARS=30
+
# Maximum image and video upload sizes
# Units are in bytes
# 1048576 bytes equals 1 megabyte