build(backend/Dockerfile): fix backend Dockerfile ENTRYPOINT

Makefile

@@ -82,7 +82,7 @@ start-%:
 .PHONY: shell-%
 # HELP(shell-$SERVICE): launch a (bash) shell inside a given service
 shell-%:
-	docker compose run --build --no-deps --entrypoint="$(ENTRYPOINT)" $*
+	docker compose run --build --no-deps $* $(ENTRYPOINT)
 .PHONY: ghci
 # HELP: launch ghci instance. Use in combination with SRC to specify the modules to be loaded by ghci: make ghci SRC=src/SomeModule.hs
 ghci: ENTRYPOINT=stack ghci $(SRC)

backend/Dockerfile

@@ -33,8 +33,4 @@ ENV PROJECT_DIR=${PROJECT_DIR}
 # RUN mkdir -p "${PROJECT_DIR}"; chmod -R 777 "${PROJECT_DIR}"
 WORKDIR ${PROJECT_DIR}
 ENV HOME=${PROJECT_DIR}
-ENV STACK_ROOT="${PROJECT_DIR}/.stack"
-
-ENV STACK_SRC=""
-ENV STACK_ENTRY="ghci ${STACK_SRC}"
-ENTRYPOINT stack ${STACK_ENTRY}
+ENV STACK_ROOT="${PROJECT_DIR}/.stack"