Fix start scripts (#8005)

* fix(Bash): Handle missing env variable

Bash installation failed when no explicit `zipPath` was set.
As it defaulted to `/`, which led to permission errors.

* fix(Docker): Fix docker volume error

Docker installation failed, because target directories of volumes should
not end with a `/`.

https://stackoverflow.com/questions/68273745/how-to-make-a-mount-shared-in-docker/68455665#68455665

apps/installer/includes/functions.sh

@@ -227,7 +227,7 @@ function inst_download_client_data {
 
     # first check if it's defined in env, otherwise use the default
     local path="${DATAPATH:-$AC_BINPATH_FULL}"
-    local zipPath="${DATAPATH_ZIP:-"$DATAPATH/data.zip"}"
+    local zipPath="${DATAPATH_ZIP:-"$path/data.zip"}"
 
     dataVersionFile="$path/data-version"
 

docker-compose.yml

@@ -32,7 +32,7 @@ services:
   abstract-bind:
     image: local/azerothcore/abstract-bind
     volumes:
-      - .:/azerothcore/
+      - .:/azerothcore
       # expose some dist folder outside allowing the host to use them
       - ${DOCKER_VOL_CONF:-./conf}:/azerothcore/conf
       - ${DOCKER_VOL_BIN:-ac-bin}:/azerothcore/env/dist/bin
@@ -45,7 +45,7 @@ services:
   abstract-no-bind:
     image: local/azerothcore/abstract-no-bind
     volumes:
-      - ac-proj:/azerothcore/
+      - ac-proj:/azerothcore
     profiles: [abstract-service] # do not run this
 
 #=======================