work with workdir

Dockerfile

@@ -10,8 +10,8 @@ RUN yarn compile
 # Install PHP dependencies
 FROM composer:2 AS composer
 WORKDIR /build
-COPY --from=buildJS . .
-RUN cd public/API && composer install
+COPY --from=buildJS /build/public .
+RUN cd API && composer install
 
 # Prepare Webserver
 FROM gitlab.jonasled.de/jonasled/apache-php-minimal:latest
@@ -25,4 +25,4 @@ RUN apk update && \
 # |--------------------------------------------------------------------------
 # | copy website from node build
 # |--------------------------------------------------------------------------
-COPY --from=composer public .
\ No newline at end of file
+COPY --from=composer /build/ .
\ No newline at end of file