Disable the postgrest rewriter's nginx http_rewrite engine logs by default,

allow them to be enabled by an environment variable REWRITE_LOG=ON

Dockerfile.rewriter

 FROM openresty/openresty:alpine AS without_tag
 
-COPY docker/balance_tracker_nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
+COPY docker/balance_tracker_nginx.conf.template /usr/local/openresty/nginx/conf/nginx.conf.template
+COPY docker/rewriter_entrypoint.sh /entrypoint.sh
 COPY rewrite_rules.conf /usr/local/openresty/nginx/conf/rewrite_rules.conf
 
+CMD ["/entrypoint.sh"]
+
 ARG BUILD_TIME
 ARG GIT_COMMIT_SHA
 ARG GIT_CURRENT_BRANCH

docker/balance_tracker_nginx.conf → docker/balance_tracker_nginx.conf.template

@@ -16,7 +16,10 @@ http {
 
             location / {
                     include rewrite_rules.conf;
-                    rewrite_log on;
+                    # ${REWRITE_LOG} will be replaced by the docker entrypoint script.
+                    # Set REWRITE_LOG=on in the environment to enable rewrite logging,
+                    # otherwise it will remain disabled
+                    ${REWRITE_LOG}
 
                     proxy_pass  http://balance-tracker-postgrest:3000;  # my PostREST is  here!
 

docker/rewriter_entrypoint.sh

+#!/bin/sh
+
+# Default value for REWRITE_LOG is off, unless explicitly set to 'on'
+if [ "$REWRITE_LOG" = "on" ]; then
+    REWRITE_LOG="rewrite_log on;"
+else
+    REWRITE_LOG="# rewrite_log off;"
+fi
+
+# Use sed to replace the placeholder in the nginx template file
+sed "s|\${REWRITE_LOG}|$REWRITE_LOG|g" /usr/local/openresty/nginx/conf/nginx.conf.template > /usr/local/openresty/nginx/conf/nginx.conf
+
+# Start nginx
+/usr/local/openresty/bin/openresty -g 'daemon off;'