Restore description of run-orchestration environment variables (#609)

Author: blink1073

.evergreen/run-orchestration.sh

@@ -2,6 +2,22 @@
 # shellcheck shell=sh
 set -eu
 
+# Supported environment variables:
+#   AUTH                   Set to "auth" to enable authentication. Defaults to "noauth"
+#   SSL                    Set to "yes" to enable SSL. Defaults to "nossl"
+#   TOPOLOGY               Set to "server", "replica_set", or "sharded_cluster". Defaults to "server" (i.e. standalone).
+#   LOAD_BALANCER          Set to a non-empty string to enable load balancer. Only supported for sharded clusters.
+#   STORAGE_ENGINE         Set to a non-empty string to use the <topology>/<storage_engine>.json configuration (e.g. STORAGE_ENGINE=inmemory).
+#   REQUIRE_API_VERSION    Set to a non-empty string to set the requireApiVersion parameter. Currently only supported for standalone servers.
+#   DISABLE_TEST_COMMANDS  Set to a non-empty string to use the <topology>/disableTestCommands.json configuration (e.g. DISABLE_TEST_COMMANDS=1).
+#   MONGODB_VERSION        Set to a MongoDB version to use for download-mongodb.sh. Defaults to "latest".
+#   MONGODB_DOWNLOAD_URL   Set to a MongoDB download URL to use for download-mongodb.sh.
+#   ORCHESTRATION_FILE     Set to a non-empty string to use the <topology>/<orchestration_file>.json configuration.
+#   SKIP_CRYPT_SHARED      Set to a non-empty string to skip downloading crypt_shared
+#   MONGODB_BINARIES       Set to a non-empty string to set the path to the MONGODB_BINARIES for mongo orchestration.
+#   PYTHON                 Set to a non-empty string to set the Python binary to use.
+#   INSTALL_LEGACY_SHELL   Set to a non-empty string to install the legacy mongo shell.
+
 # See https://stackoverflow.com/questions/35006457/choosing-between-0-and-bash-source/35006505#35006505
 # Why we need this syntax when sh is not aliased to bash (this script must be able to be called from sh)
 # shellcheck disable=SC3028

README.md

@@ -94,6 +94,15 @@ TOPOLOGY=replica_set MONGODB_VERSION=7.0 make run-server
 
 See (run-orchestration.sh)[./evergreen/run-orchestration.sh] for the available environment variables.
 
+In order to use custom certificates in your server, copy the client certificate file to
+`$MONGO_ORCHESTRATION_HOME/lib/client.pem` (where `MONGO_ORCHESTRATION_HOME`
+defaults to `$DRIVERS_TOOLS/.evergreen/orchestration`), e.g.
+
+```bash
+# Replace Mongo Orchestration's client certificate.
+cp ${PROJECT_DIRECTORY}/test/certificates/client.pem ${MONGO_ORCHESTRATION_HOME}/lib/client.pem
+```
+
 ## Linters and Formatters
 
 This repo uses [pre-commit](https://pre-commit.com/) for managing linting and formatting of the codebase.