improve(docker): support multiple API URLs option (#4044)

The API_URLS environment variable can be used to run the Docker image with multiple urls.

Example:
docker run -p 80:8080 -e API_URLS=[{name:"First API", url:"http://firstapiurl"},{name:"Second API", url:"http://secondapiurl"}] swaggerapi/swagger-ui

Dockerfile

@@ -5,6 +5,7 @@ MAINTAINER fehguy
 ENV VERSION "v2.2.10"
 ENV FOLDER "swagger-ui-2.2.10"
 ENV API_URL "http://petstore.swagger.io/v2/swagger.json"
+ENV API_URLS ""
 ENV API_KEY "**None**"
 ENV OAUTH_CLIENT_ID "**None**"
 ENV OAUTH_CLIENT_SECRET "**None**"

docker-run.sh

@@ -53,7 +53,14 @@ if [[ -n "$VALIDATOR_URL" ]]; then
   unset TMP_VU
 fi
 
-# replace the PORT that nginx listens on if supplied
-if [[ -n "${PORT}" ]]; then sed -i "s|8080|${PORT}|g" /etc/nginx/nginx.conf; fi
+# replace `url` with `urls` option if API_URLS is set
+if [[ -n "$API_URLS" ]]; then
+    sed -i "s|url: .*,|urls: $API_URLS,|g" $INDEX_FILE
+fi
+
+# replace the PORT that nginx listens on if PORT is supplied
+if [[ -n "${PORT}" ]]; then 
+    sed -i "s|8080|${PORT}|g" /etc/nginx/nginx.conf
+fi
 
 exec nginx -g 'daemon off;'