overleaf/server-ce/config/custom-environment-variables.json

{
  "databaseUrl": "HISTORY_CONNECTION_STRING",
  "herokuDatabaseUrl": "DATABASE_URL",
  "databasePoolMin": "DATABASE_POOL_MIN",
  "databasePoolMax": "DATABASE_POOL_MAX",
  "persistor": {
    "backend": "SHARELATEX_HISTORY_BACKEND",
    "s3": {
      "key": "SHARELATEX_HISTORY_S3_ACCESS_KEY_ID",
      "secret": "SHARELATEX_HISTORY_S3_SECRET_ACCESS_KEY",
      "maxRetries": "SHARELATEX_HISTORY_S3_MAX_RETRIES",
      "endpoint": "SHARELATEX_HISTORY_S3_ENDPOINT",
      "pathStyle": "SHARELATEX_HISTORY_S3_PATH_STYLE",
      "region": "SHARELATEX_HISTORY_S3_REGION",
      "httpOptions": {
        "timeout": "SHARELATEX_HISTORY_S3_TIMEOUT"
      }
    }
  },
  "blobStore": {
    "globalBucket": "SHARELATEX_HISTORY_BLOBS_BUCKET",
    "projectBucket": "SHARELATEX_HISTORY_PROJECT_BLOBS_BUCKET"
  },
  "chunkStore": {
    "historyStoreConcurrency": "HISTORY_STORE_CONCURRENCY",
    "bucket": "SHARELATEX_HISTORY_CHUNKS_BUCKET"
  },
  "zipStore": {
    "bucket": "SHARELATEX_HISTORY_ZIPS_BUCKET",
    "zipTimeoutMs": "ZIP_STORE_ZIP_TIMEOUT_MS"
  },
  "analytics": {
    "bucket": "SHARELATEX_HISTORY_ANALYTICS_BUCKET"
  },
  "mongo": {
    "uri": "MONGO_CONNECTION_STRING"
  },
  "basicHttpAuth": {
    "password": "STAGING_PASSWORD",
    "oldPassword": "BASIC_HTTP_AUTH_OLD_PASSWORD"
  },
  "jwtAuth": {
    "key": "OT_JWT_AUTH_KEY",
    "oldKey": "OT_JWT_AUTH_OLD_KEY",
    "algorithm": "OT_JWT_AUTH_ALG"
  },
  "clusterWorkers": "CLUSTER_WORKERS",
  "maxFileUploadSize": "MAX_FILE_UPLOAD_SIZE",
  "httpsOnly": "HTTPS_ONLY"
}