Allow external configure user defined origin that allows proper REST-API answer for browser originated requests

.env.example

@@ -16,3 +16,4 @@ NODEKEY=
 DOMAIN=
 EXTRA_ARGS=
 STORAGE_SIZE=
+ALLOW_ORIGIN=

ADVANCED.md

@@ -15,6 +15,7 @@ There are multiple environment variables you can configure to modify behaviour o
 * `EXTRA_ARGS` - this variable allows you to specify additional or overriding CLI option for the Waku node which will be appended to the `wakunode2` command. (e.g. `EXTRA_ARGS="--store=false --max-connections=3000`)
 * `CERTS_DIR` - allows you to define a path where SSL certificates are/will be stored. It needs to follow the directory structure produced by Certbot in `/etc/letsencrypt`
 * `STORATE_SIZE` - overrides the default allowed DB size of waku message storage service. Current default is 1GB. (e.g. `STORAGE_SIZE=2GB` or `STORAGE_SIZE=3500MB`)
+* `ALLOW_ORIGIN` - Can set the allowed origin site that is enabled to use waku node's REST-API from browser. Great if you are connecting to the node with REST-API from a browser based app. (e.g. `ALLOW_ORIGIN=example.com` or `ALLOW_ORIGIN=localhost:*`)
 
 ## Log monitoring and troubleshooting
 

docker-compose.yml

@@ -50,6 +50,7 @@ services:
       ETH_CLIENT_ADDRESS: *eth_client_address
       EXTRA_ARGS: ${EXTRA_ARGS}
       STORAGE_SIZE: ${STORAGE_SIZE}
+      ALLOW_ORIGIN: ${ALLOW_ORIGIN}
       <<:
         - *pg_env
         - *rln_env

run_node.sh

@@ -48,17 +48,20 @@ fi
 
 RLN_RELAY_CRED_PATH=--rln-relay-cred-path=${RLN_RELAY_CRED_PATH:-/keystore/keystore.json}
 
-
 if [ -n "${RLN_RELAY_CRED_PASSWORD}" ]; then
     RLN_RELAY_CRED_PASSWORD=--rln-relay-cred-password="${RLN_RELAY_CRED_PASSWORD}"
 fi
 
 STORE_RETENTION_POLICY=--store-message-retention-policy=size:1GB}
-
 if [ -n "${STORAGE_SIZE}" ]; then
     STORE_RETENTION_POLICY=--store-message-retention-policy=size:"${STORAGE_SIZE}"
 fi
 
+USER_REST_ALLOW_ORIGIN=
+if [ -n "${ALLOW_ORIGIN}" ]; then
+    USER_REST_ALLOW_ORIGIN=--rest-allow-origin=\"${ALLOW_ORIGIN}\"
+fi
+
 exec /usr/bin/wakunode\
   --relay=true\
   --filter=true\
@@ -89,5 +92,6 @@ exec /usr/bin/wakunode\
   ${DNS_WSS_CMD}\
   ${NODEKEY}\
   ${STORE_RETENTION_POLICY}\
+  ${USER_REST_ALLOW_ORIGIN}\
   ${EXTRA_ARGS}