Drill two pocket holes in each end of the door rails. Position the door rails flush with the ends of the door stiles and attach using glue and 1-1/4-inch pocket-hole screws as shown in Image 1.
Position the door stile trim 3/4 inches from the outer edges and flush with the ends of the door assembly and attach using glue and #18 x 5/8-inch wire brads.
Measure the distance between the door stile trim and adjust the length of the door rail trim if necessary. Use the pattern in Image 2 as a guide to measure, mark and cut the door rail trim.
Position the door rail trim flush with the outer edges of the door rails (with the curved area facing in) and attach using glue and 5/8-inch brads. Be sure to apply glue to the ends of the door rail trim and clamp the part in place with the door stile trim until the glue sets as shown in Image 3.
Mark a 1-3/4-inch x 1-3/4-inch square at the ends of the door stile trim parts. Drill a 3/4-inch hole in the center of each square using a Forstner bit as shown in Image 4.
Use painter's tape to mark off each square area, and prime and paint as shown in Image 5.
Apply glue to the hole and insert a 3/4-inch furniture button. Allow the glue to set.
Apply stain to the remainder of the door, including the inside lip of the door rail trim and door stile trim.