Fix warning

Author: jserv

Dockerfile

@@ -1,5 +1,5 @@
 # First stage : setup the system and environment
-FROM eclipse-temurin:11-jre-noble as base
+FROM eclipse-temurin:11-jre-noble AS base
 
 RUN \
     apt-get update && \
@@ -33,7 +33,7 @@ RUN cp source/custom.js $JUPYTER_CONFIG_DIR/custom/
 RUN cp source/jupyter_server_config.py $JUPYTER_CONFIG_DIR/
 
 # Second stage - download Scala requirements and the Scala kernel
-FROM base as intermediate-builder
+FROM base AS intermediate-builder
 
 RUN mkdir /coursier_cache
 
@@ -55,7 +55,7 @@ RUN \
 # RUN jupyter nbconvert --to notebook --output=/tmp/0_demo --execute 0_demo.ipynb
 
 # Last stage
-FROM base as final
+FROM base AS final
 
 # copy the Scala requirements and kernel into the image 
 COPY --from=intermediate-builder /coursier_cache/ /coursier_cache/