Set default api route prefix to 'api' for router docker image

Author: botisSmile

docker/router/Dockerfile

@@ -2,3 +2,6 @@ FROM nginx:latest
 
 COPY --link ./nginx.conf /etc/nginx/nginx.conf
 COPY --link ./templates /etc/nginx/templates
+
+COPY --link docker-entrypoint.d/25-replace-custom-var-env.sh /docker-entrypoint.d/25-replace-custom-var-env.sh
+RUN chmod +x /docker-entrypoint.d/25-replace-custom-var-env.sh

docker/router/docker-entrypoint.d/25-replace-custom-var-env.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -eu
+
+# Allows to set 'api' as default value of $API_ROUTE_PREFIX, even if the value for $API_ROUTE_PREFIX is not set in compose.yml files.
+API_ROUTE_PREFIX=${API_ROUTE_PREFIX:-api}
+sed -i "s|{{API_ROUTE_PREFIX}}|$API_ROUTE_PREFIX|g" /etc/nginx/conf.d/default.conf

docker/router/templates/default.conf.template

@@ -86,8 +86,8 @@ server {
         proxy_pass http://$EXAMPLE_UPSTREAM;
     }
 
-    location /$API_ROUTE_PREFIX {
-        rewrite ^/$API_ROUTE_PREFIX/(.*)$ /$1 break;
+    location /{{API_ROUTE_PREFIX}} {
+        rewrite ^/{{API_ROUTE_PREFIX}}/(.*)$ /$1 break;
 
         # Overwrite X-Forwarded-For with actual client IP
         add_header X-Forwarded-For $remote_addr;