Add ability to supply settings file via volume

- means we only do the default settings file stuff if no file is detected

.dockerignore

@@ -29,3 +29,5 @@ README.md
 .env.development.local
 .env.test.local
 .env.production.local
+**/public/*settings*.json
+!**/public/*settings.example.json

Dockerfile

@@ -25,8 +25,6 @@ RUN set -eux; \
     # Set the React production variable which holds reference to the path of the plugin build \
     sed -i "s#VITE_APP_OPERATIONS_GATEWAY_BUILD_DIRECTORY=.*#VITE_APP_OPERATIONS_GATEWAY_BUILD_DIRECTORY=/operationsgateway/#" .env.production; \
     \
-    cp public/operationsgateway-settings.example.json public/operationsgateway-settings.json; \
-    \
     yarn build;
 
 # Run stage
@@ -56,8 +54,8 @@ RUN set -eux; \
     # Change ownership of logs directory \
     chown www-data:www-data /usr/local/apache2/logs; \
     \
-    # Change ownership of settings file \
-    chown www-data:www-data /usr/local/apache2/htdocs/operationsgateway/operationsgateway-settings.json;
+    # Change ownership of settings location \
+    chown www-data:www-data -R /usr/local/apache2/htdocs/operationsgateway;
 
 # Switch to non-root user defined in httpd image
 USER www-data

docker/docker-entrypoint.sh

@@ -1,16 +1,25 @@
 #!/bin/sh -eu
 
+if [ ! -e /usr/local/apache2/htdocs/operationsgateway/operationsgateway-settings.json ]
+
+then
+
+# file doesn't exist, so go with default settings file with env variable substitution
+# if file exists, we skip this code as that means we've been supplied one from a mount
+
 # Use a tempfile instead of sed -i so that only the file, not the directory needs to be writable
 TEMPFILE="$(mktemp)"
 
 # Set values in operationsgateway-settings.json from environment variables
 sed -e "s|\"apiUrl\": \".*\"|\"apiUrl\": \"$API_URL\"|" \
     -e "s|\"pluginHost\": \".*\"|\"pluginHost\": \"/operationsgateway\"|" \
-    /usr/local/apache2/htdocs/operationsgateway/operationsgateway-settings.json > "$TEMPFILE"
+    /usr/local/apache2/htdocs/operationsgateway/operationsgateway-settings.example.json > "$TEMPFILE"
 
 cat "$TEMPFILE" > /usr/local/apache2/htdocs/operationsgateway/operationsgateway-settings.json
 
 rm "$TEMPFILE"
 
+fi
+
 # Run the CMD instruction
 exec "$@"