Generate/save the file system for each image.

Author: henrygab

.github/workflows/build.yml

@@ -46,3 +46,4 @@ jobs:
           path: |
             .pio/build/*/firmware.bin
             .pio/build/*/firmware.elf
+            .pio/build/*/littlefs.bin

ci/build-platformio.sh

@@ -17,7 +17,8 @@ pio platform install "espressif8266"
 # Compile project
 if [[ ! -v FIB_PRODUCT ]]; then
     pio run
+    pio run --target buildfs
 else
     pio run --environment ${FIB_PRODUCT}
+    pio run --target buildfs --environment ${FIB_PRODUCT}
 fi
-