add sample config for docker

config.sample.env

@@ -0,0 +1,25 @@
+# Env Settings (for local Docker Deployment)
+
+MONGO_HOST=mongo
+PASSWORD_SECRET=change_me
+
+MONGO_INITDB_ROOT_USERNAME=root
+MONGO_INITDB_ROOT_PASSWORD=example
+
+MINIO_ROOT_USER=ADMIN
+MINIO_ROOT_PASSWORD=PASSW0RD
+
+STORE_ACCESS_KEY=ADMIN
+STORE_SECRET_KEY=PASSW0RD
+
+MC_HOST_local=http://ADMIN:PASSW0RD@minio:9000
+
+# enable to send verification emails
+#EMAIL_SMTP_HOST=smtp.gmail.com
+#EMAIL_SMTP_PORT=587
+#EMAIL_SENDER=user@example.com
+#EMAIL_PASSWORD=password
+
+# Browsertrix Crawler image to use
+CRAWLER_IMAGE=webrecorder/browsertrix-crawler
+