cleans up code

env_files/project-example.env

+PROJECT_TYPE=wordpress
+PROJECT_TYPE=laravel
+PROJECT_TYPE=livewire

env_files/ssh-tunnel-example.env

-local_ip_on_remote=localhost
-local_port=5432
-local_port_on_remote=5432
-remote_host=federal-non-interactive
+LOCAL_IP_ON_REMOTE=localhost
+LOCAL_PORT=5432
+LOCAL_PORT_ON_REMOTE=5432
+REMOTE_HOST=federal-non-interactive

start-ssh-tunnel.sh

   -v \
   -N \
   -L \
-  "${TRAEFIK_LISTENING_IP}:${local_port}:${local_ip_on_remote}:${local_port_on_remote}" \
-  "${remote_host}"
+  "${TRAEFIK_LISTENING_IP}:${LOCAL_PORT}:${LOCAL_IP_ON_REMOTE}:${LOCAL_PORT_ON_REMOTE}" \
+  "${REMOTE_HOST}"