test(ops): verify Docker persistence, browser workflows and document deployment

.env.example

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+DATABASE_URL=postgres://hamham:CHANGE_ME@localhost:5432/hamham
+POSTGRES_PASSWORD=CHANGE_ME
+APP_ORIGIN=http://localhost:3000
+HOST_PORT=3000
+COOKIE_SECURE=false
+UPLOAD_DIR=./uploads
+# Only enable behind a trusted proxy that overwrites X-Forwarded-For.
+TRUST_PROXY=false