client: optimize/refactor repository path

- Reduces all calls into a single line
- Redefines path as root repository path

client/src/docker/docker.bash

@@ -21,7 +21,12 @@
 # Implementation
 #
 
-source "$(dirname "$(realpath -s $0)")/src/docker/lib/lib_docker.bash" || exit 1
+if [ -z "$DOCKER_FINANCE_CLIENT_REPO" ]; then
+  declare -gx DOCKER_FINANCE_CLIENT_REPO
+  DOCKER_FINANCE_CLIENT_REPO="$(dirname "$(realpath -s $0)" | rev | cut -d'/' -f2- | rev)"
+fi
+
+source "${DOCKER_FINANCE_CLIENT_REPO}/client/src/docker/lib/lib_docker.bash" || exit 1
 
 #
 # Execute