feat: add production deployment baseline

deploy/production/.env.example

@@ -0,0 +1,8 @@
+# Absolute path on the production host containing minjust-normalized/.
+DATA_ROOT=/volume1/docker/akyldash/data
+BACKEND_PORT=8080
+SEARCH_INDEX=akyldash-fragments-current
+OPENSEARCH_MEM_LIMIT=4g
+OPENSEARCH_JAVA_OPTS=-Xms2g -Xmx2g
+# Generate with: openssl rand -hex 32
+REVIEW_SECRET=replace-with-a-random-secret