add instructions to flash single binary image

Author: georgik

README.md

@@ -82,9 +82,9 @@ popd
 
 ### Merging all applications
 
-Following command merges all applications into UF2 format:
+The following command merges all applications into UF2 format:
 
-```
+```shell
 esptool.py --chip esp32s3 merge_bin --format uf2 -o build/uf2.bin --flash_mode dio --flash_size 16MB \
     0x10000 build/esp32-graphical-bootloader.bin \
     0x220000 apps/tic_tac_toe/build/tic_tac_toe.bin \
@@ -94,6 +94,25 @@ esptool.py --chip esp32s3 merge_bin --format uf2 -o build/uf2.bin --flash_mode d
     0xD20000 apps/game_of_life/build/game_of_life.bin
 ```
 
+The following command merges all applications into binary image format:
+```shell
+esptool.py --chip esp32s3 merge_bin  -o build/all.bin --flash_mode dio --flash_size 16MB \ 0x0 build/bootloader/bootloader.bin \
+    0x8000 build/partition_table/partition-table.bin \
+    0xf000 build/ota_data_initial.bin \
+    0x20000 build/esp32-graphical-bootloader.bin \
+    0x220000 apps/tic_tac_toe/build/tic_tac_toe.bin \
+    0x4E0000 apps/wifi_list/build/wifi_list.bin \
+    0x7A0000 apps/calculator/build/calculator.bin \
+    0xA60000 apps/synth_piano/build/synth_piano.bin \
+    0xD20000 apps/game_of_life/build/game_of_life.bin
+```
+
+The single binary can be flashed by command:
+
+```shell
+esptool.py --chip esp32s3  --baud 921600 write_flash 0x0000 build/all.bin
+```
+
 ## Build
 
 Initial build and flash of the application and partition table.