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+## Steps to publish new image for Envoy 3rd party dependencies
+
+Currently this can be done only by Envoy team.
+
+* Modify [build_container.sh](build_container.sh) to include steps for building 3rd party library.
+* Build image locally by running `docker build --rm -t lyft/envoy-build:latest .` from this directory.
+* Login into docker hub by running `docker login`. Make sure to create account beforehand and get that added to Lyft team.
+* Publish image by running `docker push lyft/envoy-build:latest`.