diff --git a/readme-vars.yml b/readme-vars.yml
index 578071b..f9649bf 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -49,6 +49,7 @@ opt_param_usage_include_env: true
 opt_param_env_vars:
   - { env_var: "PASSWORD", env_value: "password", desc: "Optional web gui password, if not provided, there will be no auth."}
   - { env_var: "SUDO_PASSWORD", env_value: "password", desc: "If this optional variable is set, user will have sudo access in the code-server terminal with the specified password."}
+  - { env_var: "PROXY_DOMAIN", env_value: "code-server.my.domain", desc: "If this optional variable is set, this domain will be proxied for subdomain proxying. See [Documentation](https://github.com/cdr/code-server/blob/master/doc/FAQ.md#sub-domains)" }
 
 optional_block_1: false
 optional_block_1_items: ""
@@ -67,6 +68,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "29.05.20:", desc: "Add --domain-proxy support."}
   - { date: "21.05.20:", desc: "Shrink images, install via yarn, fix arm32v7 build." }
   - { date: "18.05.20:", desc: "Switch to multi-arch images, install via npm." }
   - { date: "29.04.20:", desc: "Update start arguments." }
diff --git a/root/etc/services.d/code-server/run b/root/etc/services.d/code-server/run
index 89cadce..8d63daf 100644
--- a/root/etc/services.d/code-server/run
+++ b/root/etc/services.d/code-server/run
@@ -7,6 +7,12 @@ else
   echo "starting with no password"
 fi
 
+if [ -z ${PROXY_DOMAIN+x} ]; then
+  PROXY_DOMAIN_ARG=""
+else 
+  PROXY_DOMAIN_ARG="--proxy-domain=${PROXY_DOMAIN}"
+fi
+
 exec \
 	s6-setuidgid abc \
 		/usr/bin/code-server \
@@ -15,4 +21,5 @@ exec \
 			--extensions-dir /config/extensions \
 			--disable-telemetry \
 			--auth "${AUTH}" \
+			"${PROXY_DOMAIN_ARG}" \
 			/config/workspace