api: Fix file naming, add support for DEBUG env var.

api/hff_entry_forms_api.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=HFF Entry Forms (TARGET_ENV)
+After=network-online.target
+Requires=docker.service
+
+[Service]
+TimeoutStartSec=0
+Restart=always
+ExecStartPre=-/usr/bin/docker rm %n
+ExecStart=/usr/bin/docker run --rm -p TARGET_PORT:80 --name %n \
+  --env-file /etc/hff_entry_forms/TARGET_ENV.env \
+  063932952339.dkr.ecr.us-west-2.amazonaws.com/hff_entry_forms_api:HFF_ENTRY_FORMS_API_VERSION
+ExecStop=/usr/bin/docker stop --name %n
+
+[Install]
+WantedBy=default.target