Update openlane configs and Makefile

- can run the Makefile outside the container now
diff --git a/openlane/storage/pdn.tcl b/openlane/storage/pdn.tcl
new file mode 100644
index 0000000..4e918b8
--- /dev/null
+++ b/openlane/storage/pdn.tcl
@@ -0,0 +1,34 @@
+# Power nets
+set ::power_nets $::env(VDD_PIN)
+set ::ground_nets $::env(GND_PIN)
+
+set ::macro_blockage_layer_list "li1 met1 met2 met3 met4 met5"
+
+pdngen::specify_grid stdcell {
+    name grid
+    rails {
+	    met1 {width 0.48 pitch $::env(PLACE_SITE_HEIGHT) offset 0}
+    }
+    straps {
+	    met4 {width 1.6 pitch $::env(FP_PDN_VPITCH) offset $::env(FP_PDN_VOFFSET)}
+	    met5 {width 1.6 pitch $::env(FP_PDN_HPITCH) offset $::env(FP_PDN_HOFFSET)}
+    }
+    connect {{met1 met4} {met4 met5}}
+}
+
+pdngen::specify_grid macro {
+    power_pins "VPWR VDD"
+    ground_pins "VGND VSS"
+    blockages "li1 met1 met2 met3 met4"
+    straps { 
+    } 
+    connect {{met4_PIN_ver met5}}
+}
+
+set ::halo $::env(FP_HORIZONTAL_HALO)
+
+# POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
+set ::rails_start_with "POWER" ;
+
+# POWER or GROUND #Upper metal stripes starting with power or ground rails at the left/bottom of the core area
+set ::stripes_start_with "POWER" ;