Merge pull request #8246 from frank-dspeed/patch-1

Update index.md

compose/compose-file/compose-file-v2.md

@@ -196,6 +196,10 @@ or a list:
       args:
         - buildno=1
         - gitcommithash=cdc3b19
+        
+> **Note**: In your Dockerfile, if you specify `ARG` before the `FROM` instruction, 
+> If you need an argument to be available in both places, also specify it under the `FROM` instruction.
+> See [Understand how ARGS and FROM interact](/engine/reference/builder/#understand-how-arg-and-from-interact) for usage details.
 
 You can omit the value when specifying a build argument, in which case its value
 at build time is the value in the environment where Compose is running.

compose/compose-file/index.md

@@ -267,6 +267,11 @@ or a list:
         - buildno=1
         - gitcommithash=cdc3b19
 
+> **Note**: In your Dockerfile, if you specify `ARG` before the `FROM` instruction, 
+> `ARG` is not available in the build instructions under `FROM`.
+> If you need an argument to be available in both places, also specify it under the `FROM` instruction.
+> See [Understand how ARGS and FROM interact](/engine/reference/builder/#understand-how-arg-and-from-interact) for usage details.
+
 You can omit the value when specifying a build argument, in which case its value
 at build time is the value in the environment where Compose is running.