Makes required arguments overrideable from environment variables (#377)

docker/README.md

@@ -12,6 +12,9 @@ Stop and delete image and volume data:
 
 # Environment variables
 Codex docker image supports the following environment variables:
+- LISTEN_ADDRS(*)
+- API_BINDADDR(*)
+- DATA_DIR(*)
 - LOG_LEVEL
 - METRICS_ADDR
 - METRICS_PORT
@@ -30,6 +33,8 @@ Codex docker image supports the following environment variables:
 - ETH_ACCOUNT
 - ETH_DEPLOYMENT
 
+(*) These variables have default values in the docker image that are different from Codex's standard default values.
+
 All environment variables are optional and will default to Codex's CLI default values.
 
 # Constants

docker/startCodex.sh

@@ -2,11 +2,27 @@ echo "Starting Codex..."
 
 args=""
 
-
 # Required arguments
-args="$args --data-dir=/datadir"
+if [ -n "$LISTEN_ADDRS" ]; then
-args="$args --listen-addrs=/ip4/0.0.0.0/tcp/8071"
+  echo "Listen address: $LISTEN_ADDRS"
-args="$args --api-bindaddr=0.0.0.0"
+  args="$args --listen-addrs=$LISTEN_ADDRS"
+else
+  args="$args --listen-addrs=/ip4/0.0.0.0/tcp/8071"
+fi
+
+if [ -n "$API_BINDADDR" ]; then
+  echo "API bind address: $API_BINDADDR"
+  args="$args --api-bindaddr=$API_BINDADDR"
+else
+  args="$args --api-bindaddr=0.0.0.0"
+fi
+
+if [ -n "$DATA_DIR" ]; then
+  echo "Data dir: $DATA_DIR"
+  args="$args --data-dir=$DATA_DIR"
+else
+  args="$args --data-dir=/datadir"
+fi
 
 # Optional arguments
 # Log level