docker: rename docker/* files for consistency

docker/files/chatmail-certmon.service

@@ -1,6 +1,6 @@
 [Unit]
 Description=Check TLS certificate changes and reload services
-After=setup_chatmail.service
+After=chatmail-init.service
 
 [Service]
 Type=oneshot

docker/files/chatmail-init.service

@@ -1,11 +1,11 @@
 [Unit]
 Description=Run container setup commands
 After=multi-user.target
-ConditionPathExists=/setup_chatmail_docker.sh
+ConditionPathExists=/chatmail-init.sh
 
 [Service]
 Type=oneshot
-ExecStart=/bin/bash /setup_chatmail_docker.sh
+ExecStart=/bin/bash /chatmail-init.sh
 RemainAfterExit=true
 WorkingDirectory=/opt/chatmail
 PassEnvironment=<envs_list>

docker/files/entrypoint.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
 set -eo pipefail
 
-SETUP_CHATMAIL_SERVICE_PATH="${SETUP_CHATMAIL_SERVICE_PATH:-/lib/systemd/system/setup_chatmail.service}"
+CHATMAIL_INIT_SERVICE_PATH="${CHATMAIL_INIT_SERVICE_PATH:-/lib/systemd/system/chatmail-init.service}"
 
-# Whitelist only the env vars needed by setup_chatmail_docker.sh.
+# Whitelist only the env vars needed by chatmail-init.sh.
 # Forwarding all env vars (via printenv) would leak Docker internals,
 # orchestrator secrets, and other unrelated variables into systemd.
 env_vars="MAIL_DOMAIN CMDEPLOY_STAGES CHATMAIL_INI TLS_EXTERNAL_CERT_AND_KEY PATH"
-sed -i "s|<envs_list>|$env_vars|g" "$SETUP_CHATMAIL_SERVICE_PATH"
+sed -i "s|<envs_list>|$env_vars|g" "$CHATMAIL_INIT_SERVICE_PATH"
 
 exec /lib/systemd/systemd "$@"