pulls out ETHERPAD_DATA_DIR

compose.yml

@@ -39,7 +39,7 @@ services:
         ALPINE_VERSION: ${ALPINE_VERSION}
         ETHERPAD_VERSION: ${ETHERPAD_VERSION}
     volumes:
-      - ./etherpad/var:/var/app/var
+      - ${ETHERPAD_DATA_DIR}:/var/app/var
     environment:
       NODE_ENV: ${ETHERPAD_NODE_ENV}
       ADMIN_PASSWORD: ${ETHERPAD_ADMIN_PASSWORD}

make/container.mk

@@ -4,6 +4,7 @@ CPU_ARCH := $(if $(shell which arch 2>/dev/null),\
 IMAGE_PREFIX := $(if $(filter armv7%,$(CPU_ARCH)),armv7/)
 COMPOSE_CMD := \
 	IMAGE_PREFIX="$(IMAGE_PREFIX)" \
+	ETHERPAD_DATA_DIR="$(ETHERPAD_DATA_DIR)" \
 	VAULTWARDEN_DATA_DIR="$(VAULTWARDEN_DATA_DIR)" \
 	LOCAL_SMTP_PORT=$(PORT_smtp) \
 	$(foreach module,$(ALL_MODULES),$(call capitalise,$(module))_PORT=$(PORT_$(module))) \

make/vars.mk

@@ -29,6 +29,7 @@ PORT_vaultwarden := 9000
 
 PUBLIC_ROOT_DIR_ln := /var/ln.joeac.net/public
 
+export ETHERPAD_DATA_DIR := /var/etherpad/var
 export VAULTWARDEN_DATA_DIR := /var/vaultwarden
 
 $(foreach module,$(ALL_MODULES),$(if $(PORT_$(module)),$(eval \