Add Buy Me a Coffee placements

Author: iPythoning

README.md

@@ -1,5 +1,9 @@
 # Lien Deadlines — Free Mechanics Lien Deadline Reference & Open Dataset
 
+<!-- bmc:front -->
+<p align="center"><a href="https://buymeacoffee.com/dayongfan"><img src="https://img.buymeacoffee.com/button-api/?text=Buy%20me%20a%20coffee&amp;emoji=&amp;slug=dayongfan&amp;button_colour=FFDD00&amp;font_colour=000000&amp;font_family=Cookie&amp;outline_colour=000000&amp;coffee_colour=ffffff" alt="Buy me a coffee"></a></p>
+<!-- /bmc:front -->
+
 A free, statute-cited reference and calculator for U.S. mechanics/construction lien
 deadlines, plus an open dataset anyone can reuse.
 
@@ -36,6 +40,10 @@ deadlines are public law, but they're scattered across statutes and buried insid
 $400/month compliance platforms. This puts the load-bearing dates — with citations —
 in one free page, and the underlying data in the open.
 
+<!-- bmc:middle -->
+<p align="center"><a href="https://buymeacoffee.com/dayongfan"><img src="https://img.buymeacoffee.com/button-api/?text=Buy%20me%20a%20coffee&amp;emoji=&amp;slug=dayongfan&amp;button_colour=FFDD00&amp;font_colour=000000&amp;font_family=Cookie&amp;outline_colour=000000&amp;coffee_colour=ffffff" alt="Buy me a coffee"></a></p>
+<!-- /bmc:middle -->
+
 ## Data schema (`deadlines.json`)
 
 ```
@@ -79,6 +87,6 @@ Corrections to citations are especially welcome — accuracy is the whole point.
 
 _Last verified: 2026-06-10._
 
-## Support
-
-[![Buy me a coffee](https://img.buymeacoffee.com/button-api/?text=Buy%20me%20a%20coffee&emoji=&slug=dayongfan&button_colour=FFDD00&font_colour=000000&font_family=Cookie&outline_colour=000000&coffee_colour=ffffff)](https://buymeacoffee.com/dayongfan)
+<!-- bmc:end -->
+<p align="center"><a href="https://buymeacoffee.com/dayongfan"><img src="https://img.buymeacoffee.com/button-api/?text=Buy%20me%20a%20coffee&amp;emoji=&amp;slug=dayongfan&amp;button_colour=FFDD00&amp;font_colour=000000&amp;font_family=Cookie&amp;outline_colour=000000&amp;coffee_colour=ffffff" alt="Buy me a coffee"></a></p>
+<!-- /bmc:end -->